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mattology
02-06-2012, 11:21 AM
Thanks everyone on AF1/ApriliaForum! Scroll down and read below to read the entire thread from start to beginning, with recent updates up at whatever the last page is!





I haven't posted on here in quite a while, but i decided to post a little bit of a project that i have going on right now. I replaced the engine in my nik grey 2000 RS50 that I've had since 2009, but the CR125 project is now under way on the second frame that i have for the time being...


I've always been interested in the two stroke era, and will always love and prefer the sound of a zinging two stroke to the rumble or scream that four strokes offer. * *

I'm not much of a rider, as I am just learning, but the many things that I've read say that a 125gp style bike can teach you lots about corner speed and momentum.

I decided that I would build one, as, well, I dunno. *Just thought it would be neat. *I will get a larger bike next, obviously, but my goals were/are pretty straightforward.

1) under 90kg total weight of bike (will keep nimbleness correct)
2) at least 35 hp at the rear wheel, but not more than 50 ( will keep costs low)
3) easily replaceable parts and spares (great for cost, especially for a learner like myself )
4) tune for a rider weight of 69kg *(hence why i am on a diet myself! ) *

this should let me do some track days at the local spots and have some fun at least.

rather than source a 125 GP engine from an aprilia rs125 or honda *rs125 or yamaha tz125, *i have chose to go the more economical route that has a greater parts availability in using a dirt bike 125cc engine from a honda cr125. *there is a large aftermarket following of using these engines in shifter karts, where the cylinder port timing and exhaust pipes are tuned specifically for road racing. *this will give me the type of powerband that a road race bike requires, and it should get me there a little bit easier and cheaper than a legitimate honda rs125 engine...]

not only that but i can share cranks/cdi/stator/seals/gasket kits/etc with my dirt bike, so more parts interchange = better for me i suppose.

for the frame i've decided to go with the wonderful little aprilia rs50 from 1999-2005. *it's nimble, it's easy to come across, and the weight and tire sizes are almost exactly spec to a typical rs/tz 125. *the stock wheels let me throw tz/rs slicks right on it, so yeah. *

the parts list so far:
honda cr125r engine and crankcase from 1992 cr125
honda cr125r cylinder barrel from 1999 cr125 , ported to shifter kart / honda RS125 specifications. *power valve removed, said to produce ~42hp with a given pipe if squish and bottom end is in good condition with a 36mm carb, more if larger.
mikuni tmx 38 D slide carb. *i have great experience with mikunis and already have a ton of jets and needles, so yeah. *going away from the keihin was a no brainer for me. *this carb is working great on my dirtbike on the same engine, so yeah.

for the forks i'm going to just go with the racetech kits for now, and i will probably just learn how to ride the bike a good bit at first like that. *the rear shock, yeah, i don't know yet, i'm sure there is something i can put in there that will do what i want. *

anyway, here's a quick pic of my mockup frame and engine from this other rolling parts heap that i have. *

http://i.imgur.com/SO7Nb.jpg

to be continued.

mattology
02-06-2012, 09:40 PM
here is the lucky recipient of the 125 motor:

https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-snc7/s720x720/312996_10150377789163751_500558750_8194954_6620711 65_n.jpg

apriliamandan
02-09-2012, 04:25 PM
Looks good fun! What does it rid like and how does it parform?

RS_Patrick
02-09-2012, 09:21 PM
Looks good fun! What does it rid like and how does it parform?

... read his posts mate, than you see he is just getting started doing the build, so he does not know that yet.

mattology
02-12-2012, 01:12 PM
Thanks for the replies guys. I have a honda cr125r dirt bike as well, so i think it will have a powerband similar to that.

I haven't worked on it in the last week, i was involved in a car accident. I am ok though, and i was driving, not riding, so that is all good.

I am going out of state for a week on business. I hope to work on it a good deal when i get back!

JCams
02-13-2012, 08:49 PM
Yo Matt!
Good to see you on the forum.
Your project sounds rad. 125 would be funnn...

I recently installed a super duper new 50mm kit and a doppler er1 crank.
The RS is rippin!
You going to inverness? and if so are you gonna ride the RS?

mattology
02-27-2012, 08:52 AM
Yo Matt!
Good to see you on the forum.
Your project sounds rad. 125 would be funnn...

I recently installed a super duper new 50mm kit and a doppler er1 crank.
The RS is rippin!
You going to inverness? and if so are you gonna ride the RS?


Hey JCams, Sorry I didn't get to this reply sooner. I have been very busy with work, out of town, vegas, texas, georgia, miami, jacksonville, blah! Haven't had any time to work on the Aprilia either.

Hopefully this week will be much better off! I'm moving this weekend, but hope to get some good time in on the poor bike.

mattology
08-18-2012, 09:51 PM
Sorry guys,

long time no update. I have switched jobs from one engineering company to another, and have been doing a lot of travel.

I changed the motor placement a little bit, but have a good line i think i need.

With the rider weight and travel set, i have a good antisquat curve. The motor is able to be rotated in order to adjust the countershaft as necessary in order to adjust antisquat.

http://i.imgur.com/VGT0h.jpg

I have a plan for how i'm going to set up the rearset and shift linkage. The kickstart fits perfect. I will have to get some photos of that the next time I am in florida.

It looks like much work hasn't been done, and it's kind of the truth. I have the chain mounted now and everything aligned with the 520 sprocket setup. i have moved the engine a good deal in order to use the standard rear swingarm through pivot that the CR125 uses; I have modified the rs50 swingarm by cutting out the center of it in order for the CR component to fit. I will be reinforcing the swingarm in the manner that looks similar to a honda RS125, and experimenting in order to get the feel right, so I will have to make it adjustable somehow.

I am looking at how I am going to adjust steering head angle next. I am thinking about eccentric steering head bearings with a special triple clamp assembly. Not really sure. Also I need to think about something for forks. I'm considering gsx-r 600 forks with nicer internals. who knows.

I have to decide about a radiator setup also. do i want to run twin radiators from a dirt bike, or do I want to run a larger custom single radiator?

We will see what I end up doing.

chrism15
08-19-2012, 07:51 AM
nice work, will be keeping a eye on this one

mattology
08-20-2012, 08:45 PM
I will be home for about a week at the end of August. I hope to be able to install the radiators, and maybe get the pipe here by then, which would be awesome.

killerofangels
08-28-2012, 06:32 PM
Very interested in your project! I couldn't dig up too much info on the cr125 karting cylinder. Are you buying a special cylinder & head package or porting the stock one? I did find there's offerings for domed "rs125-style" pistons instead of the standard (I'm assuming flat) pistons. Looking forward to seeing your completed project. 30+ horsepower would be a very competitive engine in the club 125 classes.

mattology
09-07-2012, 10:23 PM
small update. I fly out to a big power plant on monday, schedule was moved ahead, so i sort of will not be able to even play with anything for another 3 months. i'll be lucky if i am back home before christmas.

the shifter is now properly working in a standard shift orientation. It will be a little bit more comlpicated to make a gp style shift work using oem rearsets and what not. All i need right now is a slightly shorter rod to get a little more adjustment and get the peg where i want it, but it seems for now that the shifter peg is in an alright spot. I do need a new shifter lever though.

https://sphotos-b.xx.fbcdn.net/hphotos-ash4/s720x720/393419_10151062681913751_2006672986_n.jpg

Yes, it is a full '99 spec shifter kart cylinder with the power valve removed, etc.

mattology
09-07-2012, 10:28 PM
I also need to get some RS50 fairings for this thing. I guess I will order the full kit from here:

http://www.airtech-streamlining.com/aprilla/RS502002-05.htm

unless someone has a better idea for me?

mattology
09-18-2012, 08:23 PM
I have a line on a lot of spares and all sorts of stuff that will definitely benefit me, so i'm gonna get this stuff.

mattology
10-28-2012, 10:48 PM
so i bought JCams' RS50, since it comes with all the spares! So... two running rs50s' , (well, one RS125 and one RS80) for christmas??? :)

mattology
11-25-2012, 10:16 AM
Well, i picked up this bike yesterday. Took it for a spin, i'd never ridden a Kitted AM6 before. I was really impressed!

50mm TOP performance cylinder kit
Doppler Endurance crankshaft
21mm dellorto
LeoVince pipe
Barnett clutch

Overall it's a wonderful little bike. It will be almost a bummer to take the engine out of this one and put the 125 in if I can't get the 125 chassis titled. We'll see!

mattology
11-25-2012, 10:17 AM
Here is a photo of it and all the stuff that came with it:

http://i.imgur.com/IuxjJ.jpg

chrism15
11-25-2012, 10:45 AM
that is a nice set up! plenty of spares there too, ideal for using on the track.. win win

you will do well with that bike, would be nice if you could keep the am6 engine... alot do the 85cc dirt bike engine conversion

apriliamandan
11-25-2012, 01:23 PM
Ive seen that photo on the internet before....hummmm

mattology
11-25-2012, 01:32 PM
Yes, justin took the photo of it. I guess i will walk downstairs and take a couple photos of it myself haha. be right back.

chrism15
11-25-2012, 01:44 PM
yerr i did think i saw it on this very forum maybe last year?

mattology
11-25-2012, 01:45 PM
Here are some photos I just took

http://i.imgur.com/asnkt.jpg
http://i.imgur.com/NCulI.jpg
http://i.imgur.com/OGx53.jpg

chrism15
11-25-2012, 01:47 PM
nice! so its sunny over there in the usa? here in the UK all we"v had is rain and its even dark now!

apriliamandan
11-25-2012, 02:33 PM
350z yours? Dad just sold his to get a 370z.

mattology
11-26-2012, 10:27 AM
Yes, it's my 2003 350Z in Brickyard Red. I really like the 370's also.

gsaltus
11-26-2012, 10:47 AM
You could almost build another bike with all those spares.

apriliamandan
11-26-2012, 11:13 AM
Yes, it's my 2003 350Z in Brickyard Red. I really like the 370's also.

Sweet! Is it a fairlady?

mattology
11-27-2012, 11:45 AM
Gsaltus: that's what the idea is to do with this spare chassis from page 1:

http://i.imgur.com/VGT0h.jpg

That's the primary reason why I bought the bike, to get all the missing parts and pieces for the 125 chassis'd bike.

mattology
11-27-2012, 11:46 AM
Apriliamandan,

It is simply a 350Z. Here in the US we never received a model that was differentiated or called a Fairlady. They were called Fairlady Z's in japan, but over here we just received 350Z's with different trim levels.

Base
Enthusiast
Touring
Performance
Track

This model is a "Performance"

apriliamandan
11-28-2012, 03:19 PM
Apriliamandan,

It is simply a 350Z. Here in the US we never received a model that was differentiated or called a Fairlady. They were called Fairlady Z's in japan, but over here we just received 350Z's with different trim levels.

Base
Enthusiast
Touring
Performance
Track

This model is a "Performance"

Ohright, the only reason i asked because yours looks like it has the 18" wheels that dads old import fairlady z had. I think the only difference with the imported ones is that they have folding mirrors and fairlady badges (that i dont like). Lovely cars

gsaltus
11-28-2012, 03:44 PM
Gsaltus: that's what the idea is to do with this spare chassis from page 1:

http://i.imgur.com/VGT0h.jpg

That's the primary reason why I bought the bike, to get all the missing parts and pieces for the 125 chassis'd bike.


Ok cool I should have known as much. Hope it works out.

mattology
12-16-2012, 03:39 PM
Well the holidays are here and with crazy family stuff and moving and what not I hope to be able to get the welder, the main bike, the spares, the project bike, and all the tools together once again. Hahaha. if only it were this easy! Anyone any ideas as to what to use for radiators?

mattology
12-28-2012, 12:18 AM
Hey look! Updates! https://sphotos-b.xx.fbcdn.net/hphotos-ash4/480706_10151222097148751_427236328_n.jpg

http://distilleryimage7.s3.amazonaws.com/c3255aae505211e28d2722000a1f8fa0_7.jpg

I'm going to mount the fairings up and begin seeing what I have to do to mount the radiator. I haven't decided whether i want to run a single or dual radiator setup. suggestions?

killerofangels
12-28-2012, 12:52 AM
Why not just mount a CR125 radiator as it's already the right size for the engine? If nothing else, mount the original RS50 radiator and keep a close eye on the temp gauge while the engine is running at full throttle highway speeds. It will give you a good indication of what the cooling demands are of your new engine.

BTW... I have the same type of shop press as the one in your picture. Such a shame it's too small for the RS50's wheels (to insert bearings). I had to take out the hydraulic jack and mount it under a table to get them in.

mattology
12-28-2012, 09:21 PM
The CR125 utilizes dual radiators which are not a beautiful fit inside the chassis. i'm going to look at some other ideas and see if maybe a quad radiator may be the best solution. However with the stock radiators on my CR pictured behind the aprilias I haven't really had many issues with it overheating unless i'm doing trials type things with it where i'm not moving very quickly. I think with some good airflow I won't have major cooling issues with a single radiator that is a little larger than the RS50 radiator. we will see.

nicketynoo
12-29-2012, 02:45 AM
What radiator came with the RS Matt? Dont know if you're aware but the earlier ones had a larger Rad than the later ones, it might be worth trying to obtain one of these. Have a quick look through my project " 1999 rs50 2 year project" there's a comparison photo of the two different sizes. I've still got the original larger Rad if you're interested, its in good condition.

mattology
12-29-2012, 09:39 AM
I am not sure what radiator it has. I will measure it tonight when I get home tonight.

RS_Roadrage
12-29-2012, 03:06 PM
I cant see any isuess, id go with the old RS type radiator mounted with some good quality silicone hoses clean out the water jackets with a dremel if needs be for extra cooling use good quality "engine ice" and there shouldnt be a problem! One thing i will say is that how are you going to mount a temp sensor?

mattology
12-30-2012, 12:18 AM
I can simply drill and tap the cylinder head if necessary

killerofangels
12-30-2012, 10:44 AM
There are plenty of in-line couplings that can hold a thermostat (such as this one (http://www.kosonorthamerica.com/new/shop/motorcycle_acc/water-temperature-sensor-adapter-26-mm-4/) from Koso) although I'm sure there's some kind of benefit from getting a reading directly at the cylinder head. What's wrong with the sensor from the CR? Most of the engine swap components for my project are the stock ones from the donor bike.

mattology
12-31-2012, 01:46 PM
I do not believe the stock bike actually has a temperature sensor. there's no gauges or anything on motocross bikes. haha. I did find out this, however.

The rs50 i bought from jcams has the larger radiator. The dimensions are the same, but the core is more than twice as thick.

http://distilleryimage3.s3.amazonaws.com/2db8304c537a11e2947622000a9e138b_7.jpg

mattology
12-31-2012, 01:47 PM
does the front fairing look kind of squished up to you?

http://distilleryimage9.s3.amazonaws.com/5a1b97aa537011e28fa722000a1fbcea_7.jpg

LukeRS
12-31-2012, 01:55 PM
I would go with yes! It looks very squished. I think it looks good though. A good kind of squished up. What would be nice is a flat screen, despite the negative affects it has to aerodynamics...it would look great

chrism15
12-31-2012, 02:07 PM
yerr the front nose cone does look a bit more streamlined :p: gotta admit though it looks good!

mattology
12-31-2012, 02:25 PM
damnit. so i guess i might need a new front fairing stay, or bend this one back into some sort of shape. I have the front fairings on, sort of now. I have the front piece, the two big side pieces, and the belly tiny triangle pieces that hold the bottoms together.

it all sort of lines up, but was kind of a bitch.

https://sphotos-b.xx.fbcdn.net/hphotos-ash3/564660_10151228252423751_836447045_n.jpg

http://distilleryimage8.s3.amazonaws.com/70ad1de6537e11e282e122000a1f9aae_7.jpg

chrism15
12-31-2012, 02:33 PM
tbh i like the front nose cone like that, if you can sort out a screen to fit then id keep it that way :)

mattology
12-31-2012, 03:15 PM
i have begun shaving the right side fairing to clear the kick starter. i'm eating lunch right now but will see what i can do and post some pictures afterward

mattology
12-31-2012, 04:29 PM
does this look horrible?

http://distilleryimage4.s3.amazonaws.com/d5809a60539011e2bb0922000a1fbf4a_7.jpg

everything clears right now.

mattology
12-31-2012, 04:33 PM
by the way: once everything is built / modified / cleared / installed / etc, it's all coming back apart for sandblast / paint / powdercoat / polishing / anodize / etc.

chrism15
12-31-2012, 04:48 PM
looks neat enough to me, nice to know it will be clean and shiny in the long run :)

LukeRS
12-31-2012, 04:55 PM
Well cosmetics after mechanics is always best. I think it looks tidy. Potentially a great project. Keep it going

mattology
12-31-2012, 05:24 PM
I am able to get a good kick right now, while wearing my sidi riding boots, so I am pretty sure it will be alright like that. I might trim a little more down the road but I think it will be good for starting at least. I have removed the fairings and i'm working on the mount finalizations for now. Everything is simply tacked in place for the time being, but now that the chain, starter, shifter etc are good, I can do some final beads.

LukeRS
12-31-2012, 05:32 PM
@matt, you thinking about a GP shifter? Also what you thinking about the front screen? Cos the nose cone looks perfect with that kind of bend to it and would look really great with the screen to fit it, not the stock one? Just a few thoughts

mattology
12-31-2012, 06:01 PM
I haven't really thought about what I would do for a screen. I suppose I could do someting like get some clear lexan or something and try to make it fit. I will take a look at the stock screen and see how it fits on there. it will probably be too bulged or whatever, so maybe I can cut it down a bit and it will magically fit? Haha. We will see.

For the shifting I am keeping the 1 down 4 up traditional shifting pattern. You can see the shift linkage photo below, if it loads:

https://sphotos-b.xx.fbcdn.net/hphotos-ash4/393419_10151062681913751_2006672986_n.jpg


I have since replaced the rearset as that thing was bent and broken when I picked up the chassis.

I need to shorten the shaft that connects the linkages I think.

LukeRS
12-31-2012, 06:05 PM
Yeh I see. I like your project actually. It might just be dirty/shabby but you replacing that rear shock?

mattology
12-31-2012, 06:19 PM
yes, i am going to do some sort of adjustable rear shock that you can get different spring rates for. I am thinking about maybe an Ohlins TTX25 off of FSAE cars or something. I don't think i need a 36mm rear shock for this thing. For the front forks I am not sure. I really want something nice and lightweight but can't bring myself to spending more than 3 grand for the entire thing. I woudl love to get the marzocchi rs125 forks or something, that would be nice, but ideally I will get something that someone will be able to adjust once I start learning how to ride. We will see what happens next year, maybe i just throw ohlins nix30's on the front

LukeRS
12-31-2012, 06:26 PM
Yeh I was about to suggest the 125 forks in my last post, but didn't want to tell you how to do your project. If you did get the ohlins rear, If I were you I would get a set of 125 forks and then spray then in a kind of ohlins bronze/gold colour. But it really depends on the rest of the bikes colour.

mattology
12-31-2012, 06:36 PM
the front forks are rubbish, so yeah, replacing them has always been the plan!

mattology
12-31-2012, 06:37 PM
How much are 125 forks in the uk? What do you think shipping would be like to the states? no one, and i mean no one is in to these bikes over here, ave for a few guys in southern california where they race them in m1gp. Everyone thinks even 600s are small in the usa, of course americans are all fat asses, so yeah.

LukeRS
12-31-2012, 06:43 PM
Lol so it's basically all liter bikes and Harley's? If you want I can check. I'll look for some of the old shape rs125 forks? Or do you want some different ones?

LukeRS
12-31-2012, 06:47 PM
On eBay UK there are a set of forks with bottom yolk for 59.99 and shipping would be $44.99. However there are a few Rs125 forks on eBay USA?

mattology
12-31-2012, 06:54 PM
what can i do to tune these ? are rebuilds / different spring rates / different valvings readily available ? http://www.ebay.com/itm/2006-APRILIA-RS125-USED-FORK-SET-/320962042295?pt=Motorcycles_Parts_Accessories&hash=item4abad419b7&vxp=mtr

chrism15
12-31-2012, 06:54 PM
i guess its coz you guys in the USA have wide as hell roads?

a set of second hand 125 forks shouldnt be too expensive here in the uk... have a look on ebay, should give you a good idea and maybe if someone is selling a pair they could sort out shipping with you

mattology
12-31-2012, 06:57 PM
i'm just wondering if it's worth the hassle to do these forks vs doing something that i can get ohlins inserts for or soething like that. I doubt any forks are going to be properly set up for this little pos, so i'm going to need to play with valving and spring rate to get it to act normal..

mattology
12-31-2012, 06:57 PM
it's because americans are all concerned with size matters, and you gotta have a 1000 otherwise its considered a girls bike.

idiots

chrism15
12-31-2012, 07:02 PM
i can imagine,

well get them on some PROPER twisty roads and kick there ass! :burnout:

LukeRS
12-31-2012, 07:05 PM
Yeh bigger isn't always better though

killerofangels
12-31-2012, 07:14 PM
it's because americans are all concerned with size matters, and you gotta have a 1000 otherwise its considered a girls bike.

I still get more attention on my 50 than every other rider (which is 90% Hayabusas in my area)!

mattology
01-01-2013, 01:16 AM
So being that this bike is going to be mostly a track bike (i travel a good part of the year for work ) I still don't know if it is wise to get the rs125 forks. I would need those triple clamps as well then, right? What about bearings?

LukeRS
01-01-2013, 06:11 AM
Just buy the respective bearings. I've seen a few sets which come with bearings (eBay UK). But I think the forks will improve the performance? Especially if you pair them with an adjustable rear!

chrism15
01-01-2013, 06:17 AM
the rs 125 forks would look much better thats for sure! probly be a bit stiffer also.. could make you feel safer in a corner

i would just buy the lot together, i mean RS125s get blown up, stripped and sold for parts on ebay all the time.. im sure someone will have a set of forks, triples, but maybe buy new bearings for peice of mind

there is a bloke in another thread very recently here who has put RS125 forks on his RS50

mattology
01-01-2013, 03:28 PM
I'm looking for that thread but i'm having problems finding it. I am also thinking about R6 forks?

chrism15
01-01-2013, 03:36 PM
i cant find one with actual details and pictures based purely on the forks :(

maybe send Rs50streetR a message and ask him what was involved when he fitted his shiny upside down forks?

link to his thread (streetfighter build) here where he has a couple of pics

http://www.apriliaforum.com/forums/showthread.php?262850-1998-aprilia-rs50-streetfighter

killerofangels
01-01-2013, 06:24 PM
Would changing the forks mean you have to change wheels as well? I mean, the forks hold the calipers and I'm not sure but I'd imagine there are slight differences in the offset from wheel to rotor between different bikes as the 125s have wider wheels, right? You couldn't just re-use the RS50's calipers because most of the bikes you're talking of swapping forks with have radial mounted calipers.

Also, why use a kick starter at all? If this is a track bike then just push start it like all the GP teams do!

chrism15
01-01-2013, 06:31 PM
brakes off a 125 would be a good thing to transfer over aswel, espically if your running a more powerfull set up like a 70cc/80cc am6 or a doner motor off a dirt bike like KX 85

mattology
01-02-2013, 09:36 AM
i love kickstarters, and the bike's going to be street registered. i don't want to like, ride up to a coffee place and then not be able to get the thing pushed again for one reason or another. it is going to be a streeted bike, with mainly track emphasis, but still, the kick starter is necessary if you ask me.

LukeRS
01-02-2013, 10:08 AM
MIGHt be a nooby question, but why not electric start?

chrism15
01-02-2013, 10:36 AM
just extra weight from the starter motor, every little helps with a race bike... you would be very surprised if you removed ALL the little things and then put them all on a set of scales and then the bike is X'kg lighter. espically a bike like the RS50 it all matters

some people really go to the extreme with bigger bikes for example the aprilia Dorsoduro 750.. it seems that the best thing for that bike is to go on a massive diet (plus the rider lol). aftermarket exhausts which are lighter and sound nicer, iv even seen some people go to the extreme of shaving some metal off the head of every single bolt to cut down a little bit!!

every little counts

mattology
01-03-2013, 10:53 PM
I don't know of any electric starts for CR125's. I don't know if there was ever an enduro honda 125 made, to be honest.

I've decided to keep the stock radiator. I will go with a larger radiator if it is needed, by getting a thicker one made if that's what it really comes down to. I am simply limited on space underneath this bike without lowering the motor more, and I don't want to do that because I like where the countershaft is. I will monitor the temps and see how we do.

I have to finish modifying the rear swingarm, and then I can begin the full chassis swap.

Speaking of which, does anyone have any interest in the built AM6 that I have? Doppler crank, TOP 50mm cylinder kit, phbg 21, leovinci pipe, barnett clutch, etc? I won't be needing it anymore with the bigger motor.

rs250lape
01-05-2013, 01:49 AM
how much you looking to get?

mattology
01-05-2013, 10:21 AM
I have no idea, a trade for an rs125 front end would probably be the best. i could probably just sell it all on ebay though.

chrism15
01-05-2013, 10:30 AM
from the money you get from the am6 you could proberbly buy a RS125 front end off ebay

mattology
01-06-2013, 12:42 AM
So I should sell the engine together, or part it out?

apriliamandan
01-06-2013, 08:29 AM
So I should sell the engine together, or part it out?

Ive seen complete RS50 engines on ebay for buy it now 250 mate. Think you might get more breaking it for parts like most things but not sure.

chrism15
01-06-2013, 11:58 AM
personally, id sell it whole.. lump of money in one go

yerr sure you could get more money in the long run by stripping it and selling it for parts but means more time and more work

depends how quick you want the money, but for the price of the engine whole you should be able to pick up a good condition RS125 front end complete on ebay

killerofangels
01-06-2013, 08:15 PM
He's not the only one in the market for a 125 front end. Unfortunately, they were never sold in the North America. We did actually get the most recent model in 2009 but they didn't sell very well as they're not even street legal here. Good luck finding somebody breaking those for parts! It's also near impossible to find somebody from ebay UK to ship overseas. There's a bunch of parts (and bikes) I would've loved to pick-up if only I had a reliable way to purchase/ship them over here.

mattology
01-06-2013, 11:29 PM
Well I have the motor out and it's for sale I guess.

Am6
Top 50mm kit
Doppler crank
Phbg 21
Barnett clutch
Tuned wonderfully, very fast
$600.00

Athena 70cc kit in wonderful condition
$150.00

Leovinci exhaust in decent condition
$125.00

Phbg 20mm in good condition
$50.00

I will put some photos up tomorrow they're too large for the uploader on this site.

mattology
01-06-2013, 11:35 PM
I have the swingarm brace completed and some oil impregnated bronze bushings coming for the final swingarm through bolt. From there, I just have to paint the places where it has been welded, and then I can install it.

Things left:

125 exhaust Pipe
Coolant hoses and temperature sensor install
Bronze bushing swingarm install
Remove tachometer (stupid cable!!)
Clutch cable bracket and cable fitting
Modify rear subframe to remove pointless brackets
Install correct cdi

Not much left now...

mattology
01-08-2013, 01:29 PM
alright, here's the links to some of the stuff i'm selling:

Here are some things... I posted them in the for sale forum but since we're kind of ignored...

Athena Cylinder kit 150.00 - http://www.apriliaforum.com/forums/showthread.php?264148-RS50-Minarelli-AM6-Athena-cylinder-kit-Excellent-condition-150


LeoVinci pipe 125.00 - http://www.apriliaforum.com/forums/showthread.php?264147-RS50-LeoVinci-tuned-pipe-for-minarelli-AM6-RS50

Built AM6 - TOP/Doppler/PHBG - 600.00 http://www.apriliaforum.com/forums/showthread.php?264146-RS50-Built-Fast-Minarelli-AM6-80cc-TOP-DOPPLER-DELLORTO-BARNETT

mattology
01-13-2013, 01:59 PM
Here is a photo of the rear swingarm mount complete minus paint. Notice the oil impregnated bronze bushings installed inside to center and brace stuff, as well as the swingarm reinforcement using chromoly.

http://i.imgur.com/1k3PD.jpg

killerofangels
01-13-2013, 10:26 PM
Did you just cut through the stock swing arm and weld an extra tube behind the pivot? And why bronze bushings? I'm not too familiar with metals other than aluminum and steel.

mattology
01-13-2013, 11:11 PM
Yes, sort of.

The cr125 motor is designed to have the swingarm pivot through the crankcase, unlike the rs50's setup with the am6. I felt this would be a good thing to do when installing the motor into the rs50, so I cut the swingarm to fit the case pivot between it. Then, I welded the chromoly behind it so that there would be some more stiffness there. I also used the oil impregnated bronze as a bearing material inside the swingarm, and cut down the bushing insert to the right length so that there wouldn't be any binding. Lastly I made some slight adjuustments to the chain alignment pivot in the frame to make sure the right amount of stress was on the frame when tightening the swingarm pivot.

We will see how it turns out, the bike has only a few things left, but I leave for Pittsburgh tomorrow so I won't get to touch it for a month.

http://imgur.com/qulF2.jpg

http://imgur.com/v8OwG.jpg

Clutch cable installed, throttle cable installed, radiator installed, few other small things.

mattology
01-13-2013, 11:37 PM
photo of the other side taken with real camera

http://i.imgur.com/OjoOE.jpg

i guess the rs radiator isn't that small when looking at it compared to the 125...

mattology
01-13-2013, 11:44 PM
the other side..

http://i.imgur.com/vTrlY.jpg

chrism15
01-14-2013, 12:16 PM
looking good!

mattology
01-14-2013, 09:18 PM
thank you, it's getting there, slowly!

mattology
01-17-2013, 08:42 AM
Ordered new tires. yay, no more MT75's!!!!!!!

mattology
01-17-2013, 10:55 PM
Crazy question here, but for anyone who has taken apart RS50 forks before ( i am not near my bikes, i'm out of state on work ) :

I have two sets of marzocchi forks. i'm under the impression that only one of the forks does damping, and the other is just on the ride for spring.

can I take the damping fork from each bike to have better damping characteristics, since both forks will have damping now? I'll have to switch the lower part of the fork over though, right? is that possible?

mattology
01-17-2013, 10:59 PM
according to this diagram, it looks like the fork that holds the brake caliper also has the damping seals on the bottom. if that's the case, worse case scenario means i just have two forks that have brake caliper mounts, except only one actually has the caliper...

http://www.af1racing.com/store/prodimages/st2/table_05-49.jpg

chrism15
01-18-2013, 04:22 AM
maybe just look for a whole RS125 front end? people break there bikes for parts alot in the UK and shuv it all on ebay, you could probly pick up a set of forks, yokes and trees, brake caliper for not 'too' expensive if you buy each thing individually.

i doubt you would have over kill on the brakes as youv got alot of extra power, so these brakes should actually help

mattology
01-18-2013, 07:53 AM
Shipping is around 300 US dollars . No one actually wants to ship. Plus, I don't know if there's enough adjustability in the rs125 forks. We will see though. The af1 kit with .8kg and 30wt oil and double dampers will be significantly less expensive, considering what I already have.

RS_Roadrage
01-18-2013, 02:08 PM
If you got both parts , aslong as it doesnt damage anything, cheak and cheak again, then i cant really see a problem, as for 125 forks is it me or does the rs 50 front end look very down los compared to standard?

mattology
01-18-2013, 04:56 PM
down los?

mattology
01-20-2013, 12:07 AM
I have a double adjustable 280mm rear shock on the way with 1000lb/in spring rate per Smartbomb Mike Kojima, and the AF1 fork upgrade kit as well on the way. So this should get the bike a little more sorted.

mattology
01-24-2013, 11:06 PM
the rear shock came, along with the tires. here is a photo of the shock.

http://i.imgur.com/wHhMUUA.jpg

chrism15
01-25-2013, 12:59 PM
nice shock, how are the new tyres looking?

mattology
01-25-2013, 02:52 PM
I will see if i can get some photos of the tires. i'm not home right now, haha. i'm away for work.

mattology
01-25-2013, 11:16 PM
so they decided to install the shock, haha

http://i.imgur.com/zo12C37.jpg

http://i.imgur.com/OR8gzMc.jpg

new tires

http://i.imgur.com/whSPV9a.jpg
http://i.imgur.com/JKHw1te.jpg
http://i.imgur.com/fZ2afo9.jpg

apriliamandan
01-26-2013, 10:55 AM
That rear shock looks sweet. Those tyres look alot better than the MT75's, i bet they will transform the handling! Really is coming along well now. :)

mattology
01-26-2013, 11:17 AM
Thanks guys. Yeah it is getting there... and I have no idea when I'll be home again to ride it :/

apriliamandan
01-27-2013, 10:57 AM
Thanks guys. Yeah it is getting there... and I have no idea when I'll be home again to ride it :/

I bet you're missing your 350z i see there! ;)

mattology
01-27-2013, 03:08 PM
hahaha i hate that 350z most of the time. It's pretty cool but I don't know, it just doesn't have the character that a two stroke or a turbocharged car has. i think i would like it more if it were a 2.5L v6 with twin turbos or something. THe motor is just torquey, lazy, and not nearly as fun sounding/acting/emotional.

Trying to keep it under 100,000 miles :) it's a 2003 and I only have like 91k on it. Since I travel for work, I pretty much drive rentals all the time so I really only drive it 3 months a year.

I need to repaint it, fix some other things on it, like when someone broke into it on the passengers side door handle, etc. It will get there though. My girlfriend loves the damn thing, haha.

apriliamandan
01-27-2013, 03:57 PM
hahaha i hate that 350z most of the time. It's pretty cool but I don't know, it just doesn't have the character that a two stroke or a turbocharged car has. i think i would like it more if it were a 2.5L v6 with twin turbos or something. THe motor is just torquey, lazy, and not nearly as fun sounding/acting/emotional.

Trying to keep it under 100,000 miles :) it's a 2003 and I only have like 91k on it. Since I travel for work, I pretty much drive rentals all the time so I really only drive it 3 months a year.

I need to repaint it, fix some other things on it, like when someone broke into it on the passengers side door handle, etc. It will get there though. My girlfriend loves the damn thing, haha.

Can't beat a good peaky 2 Stroker.....no matter what! ;)
Yeah, dad had a 03 fairlady Z,just like yours (fairlady and UK cars have little difference), then traded it in last year for a UK 370z. He much prefers the 370z, it revs a lil higher and a lot more powerful! You might prefer it then. Tbh all the Z cars IMO are awesome! I see what you mean though, they just go fast, no character. Thats why dad has 2 strokers and 1920's Austin 12's to go with it! lol

I must say, 100,000 miles is ALOT! Have you not had problems at all? I suppose its a big old lump so doesnt get much stress, like our Am6 engines! haha :)

mattology
01-27-2013, 09:02 PM
100,000 miles for a Nissan is not very much at all! They are really reliable engines if you do all of the maintenance. My previous Nissans (300ZX , 215,000 miles ) , (240sx , 197,000 miles) , and maxima (200,000) miles all lived quite long lives! 12,000 miles / year is average in the usa.

apriliamandan
01-28-2013, 10:32 AM
100,000 miles for a Nissan is not very much at all! They are really reliable engines if you do all of the maintenance. My previous Nissans (300ZX , 215,000 miles ) , (240sx , 197,000 miles) , and maxima (200,000) miles all lived quite long lives! 12,000 miles / year is average in the usa.

Wow thats pretty good going! Better than a Diesel passat!

mattology
01-29-2013, 09:20 AM
The fork kit from AF1 comes today! I might have my friend look into seeing if he can switch the sliders from one side to the other.. that way my double damping front end will be a reality...

chrism15
01-29-2013, 12:00 PM
pictures? :D

mattology
01-29-2013, 09:14 PM
not really much of an update, hahaha.

i'm not home! i don't fly home for another week! so no great progress photos, haha.

http://i.imgur.com/STeSD99.jpg?1

mattology
01-29-2013, 09:14 PM
Oh, but i DID find a Honda RS125 pipe for sale, so I bought that. So that is on the way, which means really the only thing i'm waiting for on this point is to wind my stator for lighting, and then the thing will be damn near ready to go!

mattology
01-31-2013, 10:01 AM
I have decided I want to change the fairings on the bike.. I want this color scheme:

http://farm4.static.flickr.com/3200/3127774949_ecc36263ea.jpg

http://i.imgur.com/IuxjJ.jpg?1 here's the color i have now. for sale/for trade!!!

chrism15
01-31-2013, 11:41 AM
my god you have a awesome selection of spare parts!

have a look around for all the different decals/colour schemes for the RS50.. you may see another you prefer and at least you can choose the one you want first time.

look in this thread here:
http://www.apriliaforum.com/forums/showthread.php?83796-RS50-models-1995-2005

i like the Grigio dust 2002 and the Poggiali white 2004, its all down to personal preferance.. i used to have the colour scheme that you want

apriliamandan
01-31-2013, 12:00 PM
If it was me i would do my own colour scheme. All gloss black looks ace imo! I have the 2004/05 black and red colour scheme and i really like that, but thats biased. lol

mattology
02-02-2013, 03:48 PM
yeah i like the coloring i posted.

chrism15
02-02-2013, 05:14 PM
you might do better getting hold of the decals rather than finding a set of fairings with the colour scheme and decals already on, alot of bikes out there are covered in scuffs and scratches

mattology
02-03-2013, 08:08 PM
i don't want to do a vinyl wrap on the bike. does anyone have the paint codes? i could just re paint it

mattology
02-10-2013, 02:00 AM
http://distilleryimage0.s3.amazonaws.com/8115dee2733211e2b61322000a1f9358_7.jpg

pipe progress

and then i ran out of argon.

ugh.

RS_Roadrage
02-10-2013, 03:50 AM
looks great ! engine looks like its suppose to be there and seams you have that pipe fitting very nicely!cant wait to see this thing tear the roads

mattology
02-10-2013, 05:18 PM
I've disassembled the spare forks in preparation for the af1 fork upgrade kit. It looks like the lowers (sliders?) are identical, and the damping comes from the main fork leg itself. I can see where the difference is visually. I'm going to attempt to run the two damped legs on the bike. If you have access to a spare set of forks, it may be a worthwhile mod.

mattology
02-10-2013, 10:22 PM
today it was as if a bomb went off in the garage

http://i.imgur.com/3B6U3o7.jpg

this crap happened

http://i.imgur.com/3VFGXPM.jpg

these were going in

http://i.imgur.com/STeSD99.jpg?1

so i read on the AF1 fork install page that only one of the forks properly damp the front end. the question was, could you install those pieces in both sides? I looked on the diagram and it looked like i could. So, since i had a spare set of forks, i figured out how to uninstall the fork legs from the sliders, and here is what i found:

http://i.imgur.com/Kt9rW8m.jpg

http://i.imgur.com/3QlscpR.jpg

the gold one has no damping. the silver one does! They are interchangeable. So I took the silver one from my spare set of forks, and swapped it with the gold one on the bike. The bike now has the race tech 0.80 springs with dual damping fork legs, 30wt oil, and 118mm of oil height.

so we'll see how it ends up.

i think i'm going to put the tires on tomorrow if i don't get sent out for work, as well as get my argon tank refilled so i can finish the pipe.

mattology
02-11-2013, 11:15 PM
so with the forks done, iw anted to complete the pipe, but i realized i can't mount the pipe with the bike in the air...

http://i.imgur.com/UHlkgBV.jpg

the challenge

http://i.imgur.com/6OKyRVO.jpg

victory!

http://i.imgur.com/6TJ8FwZ.jpg

tesla decided to hang out.

http://i.imgur.com/Li0vRcl.jpg

tomorrow i fill the tires, mount them up, pick up a flywheel puller, pull the stator off and see about swapping it over, putting it on the ground, and finishing the pipe!

chrism15
02-12-2013, 12:10 PM
its all coming together :)

cool squirrell :p:

nice fresh rubber is exactly what you needed, keep the pics coming

LukeRS
02-12-2013, 03:19 PM
Looking like a great build and an interesting thread! Keep going!

killerofangels
02-12-2013, 10:25 PM
Good to see you're making progress. There's just one interesting thing after another. Can't wait to see how the double damping works out. Keep the pictures coming!

mattology
02-12-2013, 11:06 PM
yeah this is what happens when i'm home from the job! Haha. When i'm away at work.. nothing happens.

so after taking these to two different bike places to get the beads seated (apparently they don't like seating!!! it was a pain in the ass) these fit wonderfully on the bike.
http://i.imgur.com/D8Noxez.jpg

http://i.imgur.com/88rnyEN.jpg

without any rubbing on the front, contrary to what tora claims. i didn't do anything and with the current setup, however the bike came to me, they don't rub at all with a 100/80-17

https://www.treatland.tv/sava-MC50-racing-tire-p/sava-mc50-17x100-fslash-80-tire.htm
https://www.treatland.tv/sava-MC50-racing-tire-p/sava-mc50-17x130-fslash-70-tire.htm

http://i.imgur.com/Ka2I8gJ.jpg

http://i.imgur.com/AUxisyR.jpg

http://i.imgur.com/wvfmaiS.jpg

no chain issues

http://i.imgur.com/CiM74P8.jpg


so tomorrow, with the bike back on the ground, i should be able to finish the exhaust.

I ordered a flywheel puller, it *should* be here tomorrow, and my new helmet should be here as well. oh man, getting close now.

mattology
02-13-2013, 09:16 PM
http://i.imgur.com/XmMYMVV.jpg

http://i.imgur.com/doTlscK.jpg

http://i.imgur.com/l0VLgOP.jpg

killerofangels
02-13-2013, 09:30 PM
Do you weld professionally or just at home? That looks like a pretty serious welding setup you have in the background. Also, how are you making that pipe? Is that just chopped-up pieces of another pipe and if so, which one?

mattology
02-14-2013, 12:14 AM
It's a genuine honda RS125 gp pipe. I cut the back section and rotated it to come out the right side as opposed to the left, but did not change any angles so it will function almost identically to how it normally would. I also changed the beginning to a curved downward start, and used that from a dirt bike CR125 header, but did not change any of the tuned length or diameters, so it should function as normal.

i just weld for hobby, but it is a nice tig that will let me do aluminium and what not. If i welded more I would be a lot better. The biggest drawback to this welder is that it's minimum duty cycle is still a little bit on the hot side for doing really thin walled materials like chambers. if you are not careful you can burn a hole through it quite easily, so it is nerve racking to weld stuff up and not have it come out like rubbish.

tomorrow i hope to complete the pipe mounts, complete the initial wiring, pour some gas in it and give it a go...

nelly17
02-14-2013, 01:53 PM
Cant wait to see it rip Matt.

mattology
02-17-2013, 12:57 PM
update:

it runs,

i already broke something in the transmission, so it's coming back apart.

killerofangels
02-17-2013, 06:53 PM
so it's coming back apart.

:lol: I feel your pain. I've rebuilt my car engine about four times now as it keeps developing a new problem every time I assemble it. Keep us updated. I'm eager to see what went wrong.

mattology
02-17-2013, 10:54 PM
a picture is worth a thousand words...

coming back apart

http://i.imgur.com/HW8gIkV.jpg

bollocks

http://i.imgur.com/mUfQyj0.jpg

http://i.imgur.com/DRW126T.jpg

yep. that chunk must be jammed between gears.

http://i.imgur.com/FUR9DU1.jpg

pulled apart, cleaned, reassembled

http://i.imgur.com/eOmvDBp.jpg

i ziptie the gears on the shafts up until reassembly

a look at the cylinder

http://i.imgur.com/UFmhSOt.jpg

ready for tomorrow's work.

http://i.imgur.com/lYH73uP.jpg

it shifts and everything is good again so i will button it up tomorrow and give it a go.

mattology
02-18-2013, 06:55 PM
so it's alive for real this time!

http://i.imgur.com/b2NCYrc.jpg

did a 5 minute warmup and then rode it up and down the street at low rpm, testing every gear. everything functions well! no kickstart though. I did not trust the broken case, so I will assemble a kick start motor with the spare cases i have.

Needs a good cleaning and what not! Also needs an airbox badly. Either way it felt good to hear the damn thing run for more than just a few seconds.

feels really torquey and strong, vibrates a ton, more so than my 125. probably because it's stiffer?

LukeRS
02-18-2013, 07:06 PM
Looks great! How does it go (even on low rpm)? I'm happy for you that it has come together after such a long haul!

mattology
02-18-2013, 08:09 PM
I will post some more after the garage is cleaner, hahahaha :)

so, how does it go. hmm.

it vibrates a lot. haha. but it's not horrible, it's just significantly more than the 50. I think because the suspension is stiffer than the dirt bike that a lot more vibration is felt.

It has lots of torque even in low rpm. I was impressed. it shifts much better than the stock AM6. i've never had a good shifting AM6 though, haha.

That's pretty much it. I have to re adjust the clutch and i'll be messing with it some more tomorrow.

I need to get a tach and temp sensors on it stat! Anybody have a stock AM6 temperature sensor?

chrism15
02-19-2013, 12:42 PM
good to know it is going again, once you have got it all complete with bodywork and everything and your used to the bike.. would you mind doing a video for the folks on here?

mattology
02-19-2013, 03:23 PM
Yes I will try and make one in a few, just rode it to a coffee shop! Already thinking of ways to alleviate some of the massive vibrations due to the non counterbalanced nature of this power plant.

mattology
02-19-2013, 03:50 PM
final assembly pretty much:

http://i.imgur.com/6vebq3x.jpg

at cafe carpark

http://i.imgur.com/j6GBiTX.jpg

I need a temperature gauge for it badly. I am not comfortable opening it up without any idea what the running temperature is! Looks like I am going to have to order a Mychron or trail tech or something for it asap.

apriliamandan
02-19-2013, 05:30 PM
Looks lovely. Look forward to a vid running.

mattology
02-19-2013, 08:33 PM
http://youtu.be/sfxR_Ic30G4

RS_Roadrage
02-20-2013, 02:43 AM
That is VERY noisy by the sounds of things! louder than my ktm 125 and thats for offroad!
As for vibrations, little things can help alot, heavier bar ends, rubber bushes for the exhaust are in good condition, rubber between the frame and engine mouts, (infront of the engine not on the actual clamp), id sort the vibrations out first before the wheel and bits start falling off!

scottydog
02-20-2013, 07:41 AM
Hey she's looking good Matt! Without the airbox it'll be very loud, some like that sound some don't. It's a bit draining when riding a loud bike so I've always gone for as quiet as possible. Is there much space for an airbox? I've found bikes run smoother with an airbox in place, so well work fitting one.

The vibration issue I guess will be a tough one, even with rubber mounting it's just the nature of the beast. Do you find when in the powerband the bike is much smoother, more like butter? My Moriwaki 80 was like that, lots of vibration outside the powerband, nice and smooth when in the powerband. The rubber mounts do help a little, but also made for lots of movement with the engine, putting stress on the pipe. I guess all you can do is ride it WOT!

mattology
02-20-2013, 11:54 AM
so next on the list:



*i need to find a stator and cdi that will allow lighting power. Right now I have the lights running total loss off the battery. it's fine for regular quick rides but I don't have a battery tender and it's not the optimal solution for me. I believe electrasport makes a stator that will work and give me some power. The way the current stator is set up, there's no room to add a lighting coil. perhaps I will find an hpi unit that has the same taper.. who knows.

*i need to get a dash, probably a mychron3 gold or something because i like the backlight on it, and it has a nice display, logging, sensors, etc. much nicer than a trail tech. maybe i can pick one up used.

*i need to get it on the dyno once I have the dash setup

*i would like a nicer, higher cooling capacity radiator system. these kart cylinders make their best power around 55-60C so I have a feeling I will want better cooling

I'm guessing it will be around ~1000 more for this, and I still need a chest and back protector for my leathers.. so no tracking yet.

I also want to revisit the front mount and see if there's any way I can use a polyeurethane mounting or anything on it, as well as powdercoat the swingarm and front engine bracket.

lastly, i'd also like to remove any unnecessary tidbits from the bike to see if I can get it to its goal weight of 90kg. I weighed it and it came in at 92.3, so I would say it's possible!

RS_Roadrage
02-20-2013, 01:00 PM
Take some fuel out the tank that should give you 90 i guess! Its such a nice bike, as for the stator i had one of electrolex i think they are called and it was very cheap that was for a honda cr 250, seemed good quality and it still works, required soldering to the pick up because i was a tight arse!

mattology
02-20-2013, 04:36 PM
Yeah, I have to look into which parts will fit my cases and flywheel.

killerofangels
02-20-2013, 10:04 PM
Anybody have a stock AM6 temperature sensor?

http://www.af1racing.com/store/Scripts/prodView.asp?idproduct=2934

mattology
02-21-2013, 12:11 AM
ahaha you'll enver guess what i found at the old garage tonight!


a stock temperature sensor!

connected to a complete spare am6!!!!!!!!!!!!!! hahahaha


anybody want it?

mattology
02-22-2013, 12:26 AM
hey look,

motorbike

http://i.imgur.com/TL5GDAS.jpg?1

mattology
02-24-2013, 12:32 AM
it looks the exact same, but i have re shaped the factory exhaust bracket mount to actualy, well, hold the damn silencer now. and i have a monoposto exhaust bracket as well. so, cool? i guess.

http://i.imgur.com/myA4nMo.jpg

anyone have woodcraft (i think?) clipons and/or the AF1 top triple clamp and/or the TCW rearsets they want to sell? I will model them and get them duplicated, i promise! seriously.

mattology
02-24-2013, 07:25 PM
well since the new bikes use the same frame i'm goign to look into what it takes to get a set of those rearsets here to see if they do indeed fit...

mattology
02-25-2013, 02:35 PM
I was just deployed so I won't be able to work on her for almost two months now ! Oh well :(

apriliamandan
02-25-2013, 03:47 PM
I was just deployed so I won't be able to work on her for almost two months now ! Oh well :(

2 months!! Take a photo of her with you man

chrism15
02-25-2013, 03:59 PM
:lol:

but on a serious note that sucks man, get her sprayed up with WD40 and get a cover over it while your away.

oh and a good lock!

LukeRS
02-25-2013, 04:08 PM
Good luck abroad, Matt!

RS_Roadrage
02-25-2013, 04:32 PM
ahaha you'll enver guess what i found at the old garage tonight!


a stock temperature sensor!

connected to a complete spare am6!!!!!!!!!!!!!! hahahaha


anybody want it?
The complete am6 or the sensor?;)

mattology
02-25-2013, 06:49 PM
Well it will just stay in the garage with the Z while I'm away so I'm not worried about a cover.

The am6 was already sold! Gone to a buddy less than a day after finding it.

mattology
02-27-2013, 04:19 PM
had the amazing opportunity to purchase an AF1 billet upper triple clamp, so I jumped on it!

So the triple clamp, woodcraft clipons, new OE Aprilia grips are all on the way!

too bad i don't know when the next time i'll see my bike is.... there's a good chance it might not be until april. haha. go figure.

chrism15
02-27-2013, 05:09 PM
we'l be waiting :p:

apriliamandan
02-28-2013, 03:37 PM
had the amazing opportunity to purchase an AF1 billet upper triple clamp, so I jumped on it!

So the triple clamp, woodcraft clipons, new OE Aprilia grips are all on the way!

too bad i don't know when the next time i'll see my bike is.... there's a good chance it might not be until april. haha. go figure.

Dude!! Ill be on the road legally by April!! Whoooo! Sorry, just thought i'd put that out there as I am very excited!

Im looking forward to seeing your recently purchased parts! :)

mattology
02-28-2013, 07:46 PM
looks like i might have some even cooler goodies on the way also...

mattology
03-04-2013, 08:05 PM
yeah i miss my stupid bike already, problems and all, hahahaha. can't wait to install the new parts and throw it on a dyno!!!!!!!!!!!!!!!!!!

LukeRS
03-05-2013, 02:07 AM
Have you been deployed yet? Mmm it would be interesting to know how much it puts out at the wheel

mattology
03-05-2013, 09:45 AM
Hahaha I'm in Mississippi right now as I type this. Been here since last Monday.. Not sure when I'll be coming back argh

-CON-
03-07-2013, 11:42 AM
critics ))) nice accurate project, 125cc engine for this little bike, for the streets more than enough.

gotta say this one thing, correct me if I am wrong. from the look of it, not sure whether you were trying to fit kick start with the frame, but I think engine seating a little bit too low. that one inch or so higher would make a better balance with frame. but, it is not a pro racer so.. it is my opinion.

mattology
03-07-2013, 01:45 PM
The engine was located to be lower for a multitude of reasons, to allow the anti squat geometry that I wanted of the sprocket, to keep the weight lower, and to centralize the mass.

The kick start works perfectly with the frame, However i had a case failure that was a result of a motocross crash and I have not the replacement parts yet. However yes, the kick start clearance was one of the main design considerations. When the kick starter mechanism side case is installed, it clears and touches nothing.

That being said, I can rotate the engine on it's swingarm pivot axis in order to move the sprocket to the desired height should i want to adjust antisquat geometry separate from ride height adjustment.

-CON-
03-08-2013, 06:04 AM
okey, I see. anyway, nice bike.

mattology
03-08-2013, 11:19 PM
thanks!

mattology
03-17-2013, 07:26 PM
my lighting coil equipped stator arrived!

http://i.imgur.com/UFrGjM5.jpg

mattology
03-20-2013, 12:42 PM
I will be home this weekend to install new parts! woo!

mattology
03-22-2013, 10:06 PM
oh snap look at all this stuff!!!!!!!!!!!

http://distilleryimage0.s3.amazonaws.com/e4b1ae26934a11e29cae22000a9f1378_7.jpg

apriliamandan
03-23-2013, 06:41 AM
That display looks nice and GP like!

LukeRS
03-23-2013, 06:45 AM
Nice buying skills there, Matt! Bike's really coming along there! I LOVE that Digital display, mind if i ask where you got it from? :D

mattology
03-23-2013, 08:29 AM
It is an mxl pista from aim sports. full multi channel datalogger with lota of onboard memory. Headed to the gym now, but tearing into the bike when I get back.

mattology
03-23-2013, 11:38 PM
Ok so, already in bed for the night, but thought I would post some pictures... There will be more once its finished.


http://i.imgur.com/z1XU4aUl.jpg

Working headlights!! The stator worked perfectly.

http://i.imgur.com/kURpSsXl.jpg

http://i.imgur.com/vY0vpoLl.jpg

I also installed a new billet CNC swedetech intake.

http://i.imgur.com/ccvCBVvl.jpg

And the triple clamp and clip ons are now installed, but I've just started on the dash.

http://i.imgur.com/wlJS9Ell.jpg

Nite, ttyl

LukeRS
03-24-2013, 04:32 AM
Wow that billet!!!!!!!! Is that the af1 racing I've? I've been after one for a while. Just getting it to UK. Looks great, Matt!

mattology
03-24-2013, 11:58 AM
yes, it was the last AF1 racing triple clamp.

so it's getting to be time to remove the entire harness and re do it all, now that I have a working stator power. There's simple... too much stuff going on here.

http://i.imgur.com/xvC1ZPv.jpg

the rear subframe minimizing has begun.. gotta weld this up in a few minutes.

http://i.imgur.com/xZyCmCI.jpg

naked once again as i begin to work through all of this stuff..

http://i.imgur.com/TzUR2yd.jpg

LukeRS
03-24-2013, 12:18 PM
Looking great. Absolutely perfect! Show us how that welding comes along and the finished minimised rear!

mattology
03-24-2013, 01:13 PM
That's all I'm doing to the rear for now. Ill post a pic later but I'm disassembling the harness now since its a train wreck.

LukeRS
03-24-2013, 01:23 PM
Alright. You thinking about respraying it?

mattology
03-24-2013, 02:04 PM
Yes, frame, swingarm, and subframe once the time comes.

mattology
04-08-2013, 10:35 AM
So i might be coming home for a bit in a week or so! Hopefully ill make some good progress on the bike in that time.. Had to curb the ridiculous spending on it because I just put a deposit down on a big sister for her :)

LukeRS
04-10-2013, 05:19 AM
A big sister???!!!! ANOTHER PROJECT?:D what do you have in mind for a big sister?

apriliamandan
04-10-2013, 05:21 AM
RS125 or RS250 matt? Also what you doing with the cr rolling chassis?

Zav
04-10-2013, 07:13 AM
why not do a rs250 with a rg500 engine or a rs125 with a rg500 engine that would be fast

mattology
04-10-2013, 07:21 AM
...what's wrong with the 250 engine??

:)

might be home in less than 10 days!

mattology
04-10-2013, 07:32 AM
RS125 or RS250 matt? Also what you doing with the cr rolling chassis?

The CR should be going back together sometime soon.. it needs the front rotor replaced and straightened as well as fork seals and some other things in the front end when i crashed into a tree on a whiskey throttle mishap at my local atv/dirtbike park.. so many motorbikes, so many projects!

Zav
04-10-2013, 08:24 AM
more power and it would go well with the rs125 you made so it will also be uniqe

apriliamandan
04-10-2013, 09:48 AM
If its a rs250 you are getting, then keep is standard! Those things are going up in price by a crazy amount!

Zav
04-10-2013, 10:01 AM
there was a unfinished rs500 on ebay last year what sold at 10,000 with no fairing or exhausts but it had loads of work done to it all race spec suspension super light wheels and all other bits and bobs

and you can get a good rs250 with simular spec at 5000

apriliamandan
04-10-2013, 10:54 AM
there was a unfinished rs500 on ebay last year what sold at 10,000 with no fairing or exhausts but it had loads of work done to it all race spec suspension super light wheels and all other bits and bobs

and you can get a good rs250 with simular spec at 5000


Yeah, you need 4k to buy a rs250 on the road from what i can tell by looking on ebay. However, a super mint one will go for 7k ++++

mattology
04-10-2013, 12:33 PM
I will share more information when I go pick it up :)

2pistonpower
04-12-2013, 08:37 AM
I bought an RS250 cup new. Even got the dealership to put in for a title. Rode it for a long time. Few track days but mostly the Dragon. Put tons of money in it with hot parts. Kool bike for sure. But a PITA to ride on the street. That's why I got rid of it. I do feel fortunate to have owned it but I don't miss it.

mattology
04-13-2013, 03:46 PM
What was difficult about the street?! Haha

Relentlessmk4
04-14-2013, 12:37 PM
What was difficult about the street?! Haha:plus: I'm curious to know !

mattology
04-14-2013, 07:33 PM
i'm sure i'll figure it out soon enough haha!!!!

mattology
04-22-2013, 10:09 PM
Some updates:

http://i.imgur.com/1VprUkAl.jpg

http://i.imgur.com/DxjzCI1l.jpg

Billet cylinder head with swappable inserts and correct coolant outlet / sensor plug

Egt thermocouple installed in pipe.

mattology
04-27-2013, 10:37 PM
http://i.imgur.com/qYdsEHbl.jpg

Dash mounted, wiring about finished, going to test tomorrow I believe.

RS_Patrick
04-28-2013, 05:22 AM
Make a suround for the dash where you fit the switches in that your now missing from the right hand handlebar, maybe out of carbon if you can.

mattology
04-28-2013, 08:09 AM
Yes, I will need some sort of dash surround at some point, but I fly out on Monday so it won't be done today..

mattology
04-28-2013, 07:35 PM
http://i.imgur.com/kPwK3hH.jpg

hahaha

mattology
05-14-2013, 09:01 AM
Flying home today so more fun this week!

RS_Patrick
05-14-2013, 09:07 AM
Where you been than so long away from home?

apriliamandan
05-14-2013, 09:59 AM
So what are the plans for the Rs50/125 then? Keep looking at that digital display....its lush.

mattology
05-14-2013, 12:30 PM
This time i was in Illinois fixing a generator at a fossil power plant.

RS_Roadrage
05-14-2013, 01:32 PM
I just looked at the display zoomed in, its a piece of art! Then i notices the led writing at the bottom haha! Shes a beauty fairplay, will be nice to see a family photo of the rs!
any pictures of the 'big sisters' ?

mattology
05-15-2013, 12:32 PM
I have to pick the 250 up from 50 Joe. I bought it from him. Ill put up photos he took later today, thanks!!

killerofangels
05-16-2013, 08:14 PM
Not sure if you mentioned this already but where do you plan to race it? I was just reading over the USGPRU technical rules and their Moto3 class (for 125cc 2-strokes) doesn't allow frames based on street bikes. WERA, CCS maybe? I'd love to see this bike in action.

mattology
05-17-2013, 04:37 AM
Yeah, no idea.

In an ideal world it would race the 250cc street frames... Ninja 250, cbr250.. What classes does the 09 RS125 ape race in? That's where I'd petition this bucket to race, haha.

I have to go to the doctors today, I was having some chest pains and didn't get much done on the bike but what I did do was important; the RPM now reads correctly, and the acorn nuts and crush washers fixed the coolant weeping at the cylinder head. I have some 100LL to mix up and put in the bike and then I can zip around and see how it does.. Maybe even call a dyno today and ride it over and hopefully ride it home and not have to tow it...

mattology
05-19-2013, 09:22 AM
might need some more cooling capacity.

http://distilleryimage4.s3.amazonaws.com/d306ecaac02111e2bf1c22000aa8008f_7.jpg

http://distilleryimage9.s3.amazonaws.com/f0335192c01c11e2be0322000a9f38f1_7.jpg

either way, fkn love this thing, holy shit

been moving the needle around a good bit. it's a bit too rich right now, might need to go one click leaner but i'm not sure. I think i might actually want a little richer pilot as well. but, in four hours i fly out to pittsburgh for the week, so it will be until next time...

RS_Patrick
05-19-2013, 11:21 AM
Got the 50cc radiator in there? Maybe a 125 rad would be better.

Also take not that the RS50 1999 year radiator is thicker than the rads after that, so it cooled to much for the stock bike (never got warm) but its verry usefull if you upgrade the bike.
all years after that got thinned out radiotors so the stock bike did warm up.

mattology
05-19-2013, 01:59 PM
Got the 50cc radiator in there? Maybe a 125 rad would be better.

Also take not that the RS50 1999 year radiator is thicker than the rads after that, so it cooled to much for the stock bike (never got warm) but its verry usefull if you upgrade the bike.
all years after that got thinned out radiotors so the stock bike did warm up.

patrick,

I did manage to get the thicker 99Y radiator!! Originally plans were to move forward with a 125 radiator from the getgo, but I managed to have a 99 radiator in my bucket of spares and felt i could at least give it a go.

I have yet to try it with full fairings as well since the datalogger started up, so when I come back ill give it a go with the fairings and see if that boosts airflow at all.

if that doesn't... bigger radiator here we come.

until next time..

http://i.imgur.com/oGH2WFN.jpg

http://i.imgur.com/bFkgmTE.jpg

Relentlessmk4
05-20-2013, 09:02 AM
Id love a picture of that speedo powered on , im dying to see what it looks like!

My bad! Just went back a page and seen it, its looks amazing !

mattology
05-20-2013, 03:48 PM
thanks m8!

mattology
05-23-2013, 09:35 AM
Well, I fly back home today... Good chance ill be home until the end of July!!! Lots of stuff to get done I hope

apriliamandan
05-23-2013, 10:44 AM
Time for you to take some photographs of your two lovely Aprilia Rs's then Matt! Oh and get some miles on the Rs/CR125 eh!

mattology
05-23-2013, 12:16 PM
Yeah I will get around to it when I get them all in the same place, haha. It's hard transporting everyone with just the 350Z!

mattology
06-05-2013, 10:27 AM
So because of Joe's wreck (RS250 forum) I won't be picking up the RS250 this weekend, his health and family take precedence.

However I have moved forward with the 125. I just ordered a new radiator from AF1 for the 2009 RS125. Great price, so that should offer more cooling.

Also I have switched to a seafoam green Uni filter for the time being.

http://i.imgur.com/mjlVRlJ.jpg

http://i.imgur.com/pcuifr1.jpg

I'm wondering if, at this point, i should get a wideband system for it also.. Micah?

mattology
06-09-2013, 09:23 PM
Spent most of the day trying to put together a spare transmission with all the spare parts I have... No dice. Oh well.

mattology
06-11-2013, 06:26 AM
Last night i figured out the sleeve I was missing on the transmission. I ordered the parts so maybe that will get me going. If it does, woo, spare motor!!

I have a new issue on the bike though. The rear tire keeps going flat. I've replaced the valve in the wheel, but no dice. I'm guessing I'm going to have to take the tire off the wheel, clean the seating surface, and give it another go. I hope I didn't puncture this brand new tire!

RS_Patrick
06-11-2013, 12:10 PM
also check the valve seat/rubber and the hole in the rim mate, seen it leak between the rim and the rubber there also a few times.

mattology
06-11-2013, 02:02 PM
Yeah I'm going to replace that rubber thing as well, thanks for the reminder!

chrism15
06-11-2013, 04:02 PM
The rear tire keeps going flat. I've replaced the valve in the wheel, but no dice. I'm guessing I'm going to have to take the tire off the wheel, clean the seating surface, and give it another go. I hope I didn't puncture this brand new tire!

remove tyre, clean the rim surface up lightly. get some bead sealer on it ;)

RS_Patrick
06-11-2013, 05:36 PM
Before you pop the tire of put some soap along the rim edge to see where its leaking and mark it both on the tire and the rim so you can inspect the tire and rim more carefull on that spot for damadge.

Just fine waterproof sandpaper should do the trick and putting a little bit of non agresive soap on the beat to help to get it seated properly.

Demoni
06-13-2013, 06:21 PM
Matt if you still need more cooling you might want to look into an Honda CB1 Radiator. Was able to fit it into my project bike (stock motor cradle). Just trimmed 1/2 inch off the inner fairings and the lower cowel and it looks like it was made for the bike:

-Paz

224023

224024

mattology
06-14-2013, 09:14 AM
Nice, Paz! I have a brand new rs125 radiator coming from AF1 so we will see how that turns out first. If that doesn't cool it, I might look into the cb1 rad or maybe go full custom.

mattology
06-14-2013, 03:10 PM
Took off the rear tyre, cleaned all the surfaces, replaced the rubber wheel valve stem and the valve in it, put more tyre slick grease stuff on and aired it up,.... It's holding 28pounds for now. We will see before I put the wheel back on the swingarm...

mattology
06-15-2013, 05:25 PM
well, tyre doesn't leak!!!!!!!!!

installed some swingarm spools. used some tubular steel, welded to some nuts, on the bottom back of the swingarm. M8 size.

http://distilleryimage8.s3.amazonaws.com/08401aced60a11e299a722000a9d0ee0_7.jpg

time for plastics. gonna go on a ride w my dad tomorrow for father's day, will be the bike's longest ride yet!

mattology
06-15-2013, 07:07 PM
clean and ready to go

http://distilleryimage8.s3.amazonaws.com/5f02cad4d61711e292fc22000a1f9806_7.jpg

apriliamandan
06-16-2013, 06:02 AM
Looks like a race bike on that paddock. Awesome build Matt, just love the display and top yoke.

Oh is that a cougar in the background aswell? You got some nice cars.

mattology
06-16-2013, 08:46 AM
Haha it's my girlfriends car and its rubbish lol

RS_Patrick
06-16-2013, 08:58 AM
Nice frontwheel stand.

Nissan Z250 in the background is a much better car than the Cougar i bet :p:

apriliamandan
06-16-2013, 11:52 AM
Nice frontwheel stand.

Nissan Z250 in the background is a much better car than the Cougar i bet :p:


350Z ;) Yeah, its funny because my father went from a cougar 24v to a 350z, to a 370z....now there needs to be another Z!

RS_Patrick
06-16-2013, 12:33 PM
Thats what i ment, 350Z couldnt remember the name correctly anymore, not my kind of car :p:

mattology
06-16-2013, 02:37 PM
Well, over 60 miles riding today, and it held together! I even let my dad have a go and beat the hell out of it, and it performed flawlessly! he loved it! couldn't believe it behaved / acted / ran as well as it did. Considering it's a mishmatch of parts!!! He was really absolutely amazed. handling, power, everything.

It handles SO much better than his SV1000 haha. we traded bikes, and i was like, 'LOL HARLEY DAVIDSON'

http://distilleryimage1.s3.amazonaws.com/8b3c4f40d69811e2b89c22000ae912df_7.jpg

http://distilleryimage0.s3.amazonaws.com/3995f390d6ba11e2924b22000aaa05e0_7.jpg

http://distilleryimage7.s3.amazonaws.com/e84af396d6b911e2b12b22000aaa04d7_7.jpg

max rpm 12056
max egt 557C
max h20 80C

mattology
06-17-2013, 08:20 PM
Took some pictures this evening...

http://i.imgur.com/UsUJSZO.jpg

http://i.imgur.com/c8kCwSM.jpg

http://i.imgur.com/EgCFe91.jpg

http://i.imgur.com/t06FTf6.jpg

scottydog
06-18-2013, 07:28 AM
Looking good! Would never know looking what is under the hood. :)

mattology
06-18-2013, 07:41 AM
The big chamber peeking out the belly should be a hint...

mattology
06-22-2013, 05:58 PM
Picking up the 250 tomorrow!!!!!!! :) :) :)

mattology
06-23-2013, 04:12 PM
http://i.imgur.com/JaUVY3yl.jpg

RS_Patrick
06-23-2013, 04:46 PM
Nice, shame its a track version though :(

mattology
06-23-2013, 05:05 PM
It's getting plated.