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View Full Version : *build progress* My RS50 engine swap project



nidyanazo
07-11-2011, 12:25 PM
Well after months of doing other stuff (mainly building up my R1) I Got the itch again to do something with my Aprilia, so I'm starting the engine swap process: Currently looking for a donor dirtbike..
‪Aprilia burnout and stoppie in the rain‬‏ - YouTube

YouTube - ‪Start of RS50 engine swap project‬‏


Read alot on the forum of what other members have done and got some good ideas...

Looking at a yz125 today..

Will keep you updated

littlefeller
07-11-2011, 02:20 PM
does the tzr 125 engine fit?

nidyanazo
07-11-2011, 05:47 PM
Not sure, dont have access to any tzr's here. Looked for some time..

The YZ125 is easily available for around $1000...

Going to test one now.. If the bike is solid I'll get it and be able to start fitting the engine this week..

RS_Patrick
07-11-2011, 06:00 PM
For 1000 dollars you can get pretty far on tuning a AM-6 engine and turn it into a screamer at 14000rpm's, i know what option i pick :p:

nidyanazo
07-11-2011, 11:35 PM
For 1000 dollars you can get pretty far on tuning a AM-6 engine and turn it into a screamer at 14000rpm's, i know what option i pick :p:

I know, I've read many threads about engine swaps and you say that in every one.

The engine in the bike was a Top 75cc big bore kit, Jollymoto full pipe with Carbon endcan, Dellorto 21mm Race carb with foam filter, Ducati ign. box, Carenzini racing crankshaft, Bernett clutch, Pirelli MT75 tires.


YouTube - ‪Aprilia RS75 onboard run‬‏


and was real fun, but this 2000 YZ125 I just bought freaking rips and shreads way more then the tuned RS ever could. ~33-35HP... Here's the new bike:

http://img850.imageshack.us/img850/6730/dscn3518.jpg
http://img804.imageshack.us/img804/9482/dscn3533.jpg

It's already got a bunch of good parts on it, and it runs great. $700. Job done.

Got the custom sprocket lined up, and ordering tomorrow. Will be pulling the engine out of the YZ tomorrow also.. Stay tuned..

nidyanazo
07-11-2011, 11:47 PM
Plus I like to build stuff.

Check out this 50cc screamer I designed fabbed and welded it all up...

YouTube - ‪Franco Morini SS bike, Italian moped engine, Motovelo 50cc ride‬‏

RonneBear
07-12-2011, 03:01 AM
That push bike with the engine goes like crazy. That's Awesome =)

Ronne

nidyanazo
07-12-2011, 03:16 AM
That push bike with the engine goes like crazy. That's Awesome =)

Ronne

Thanks mate, here's another vid of it before the nice tank was fitted


YouTube - ‪Motovelo Street Sprinter POWER-WHEELIES Franco Morini 50cc‬‏

ToraTora
07-12-2011, 12:34 PM
I know, I've read many threads about engine swaps and you say that in every one.

Classic!

Look forward to reading about your build. Thanks for the link on Bats. :P

nidyanazo
07-12-2011, 02:46 PM
Also wanted to mention a big thanks to Stephen who has been a great help!

He built this one:
http://www.apriliaforum.com/forums/showthread.php?t=215787

littlefeller
07-12-2011, 03:41 PM
the 125 is the way to go, 40bhp plus is easly attained but does the 50 chasis cope? anyone, would be intresting to know

RS_Patrick
07-12-2011, 05:25 PM
Not really wel, but if you dont do anything crazy and remember the bike is extremly light and overpowerd wen you dive into a corner you should be ok, even a tuned AM-6 15HP or more RS50 wil give you a serious problem if you run over a bump or something in a corner.

Crim
07-12-2011, 08:05 PM
Thanks mate, here's another vid of it before the nice tank was fitted


YouTube - ‪Motovelo Street Sprinter POWER-WHEELIES Franco Morini 50cc‬‏ (http://www.youtube.com/watch?v=dQXnw2IMQ08)

Hard to tell what type of area these videos are shot in, but if you have any neighbors around you, I bet they just love you rofl.

xXxKillDogxXx
07-12-2011, 08:09 PM
Dont i know that lmao 30MpH crack/drop in the road and bang bike goes one way then the other then we both end up in a centeral reservation lol

garrett
07-12-2011, 10:25 PM
I can't wait to see some pictures. I am starting a build on my friends rs50.
I am putting a YZ85 in his bike. I put a KX85 in mine and it screems. Both of these bikes are track bikes. If you plan to use you bike on the street I suggest getting a lighting coil from HPI igintion to run your lights. Keep us updated on your progress.

nidyanazo
07-13-2011, 06:47 PM
‪yz125 in rs50 build: engine brackets‬‏ - YouTube

xXxKillDogxXx
07-13-2011, 08:50 PM
This is starting to look proper sweet makes me wanna get my rs50 out and rebuild it might street fight it :D i havnt got a engine for it so i could engine swap tbh

nidyanazo
07-13-2011, 09:11 PM
Thanks bud
Here's today's latest....

‪rs50 yz125 engine swap project: first 2 brackets made‬‏ - YouTube

nidyanazo
07-15-2011, 09:35 PM
‪July 15, 2011 6:51 PM‬‏ - YouTube

nidyanazo
07-16-2011, 08:37 PM
‪July 16, 2011 6:23 PM‬‏ - YouTube


http://img6.imageshack.us/img6/9331/img20110716171501.jpg


‪VID 20110716 164946‬‏ - YouTube

nidyanazo
07-16-2011, 11:59 PM
Ordered this Arrow expansion chamber and kevlar silencer..

http://www.af1racing.com/store/ProdImages/st2/gi51512su_51513su.jpg

RonneBear
07-17-2011, 01:50 AM
Looks nice man. It should fly =)
Im addicted to that push bike with the engine though, i really want to make one.

Ronne

nidyanazo
07-17-2011, 02:48 AM
Thanks Ronne

I sell the engine conversion kits for bikes (and fabricate the really quick ones for customers)
Check my site www.motovelo.us we have a bunch of videos/pics on there.

nidyanazo
07-17-2011, 07:37 PM
Got some welding done, added the electronics, and fit the carb/throttle, kill switch and clutch.

‪July 17, 2011 4:55 PM‬‏ - YouTube


http://img851.imageshack.us/img851/8185/img20110717164549.th.jpg (http://img851.imageshack.us/i/img20110717164549.jpg/)
http://img594.imageshack.us/img594/9425/img20110717164604.th.jpg (http://img594.imageshack.us/i/img20110717164604.jpg/)
http://img832.imageshack.us/img832/280/img20110717165708.th.jpg (http://img832.imageshack.us/i/img20110717165708.jpg/)
http://img706.imageshack.us/img706/1838/img20110717165721.th.jpg (http://img706.imageshack.us/i/img20110717165721.jpg/)
http://img830.imageshack.us/img830/3439/img20110717165729.th.jpg (http://img830.imageshack.us/i/img20110717165729.jpg/)
http://img850.imageshack.us/img850/194/img20110717165742.th.jpg (http://img850.imageshack.us/i/img20110717165742.jpg/)
http://img94.imageshack.us/img94/802/img20110717165748.th.jpg (http://img94.imageshack.us/i/img20110717165748.jpg/)

xXxKillDogxXx
07-17-2011, 10:29 PM
This is so temping me to get a engine for my rs50 frame and try some welding for the first time tbh would be a good reason to learn to weld aswell :D this is a awesome project cant wait to see it all finished

nidyanazo
07-18-2011, 12:06 AM
Thanks dude, you should.

Just ordered these, and a carb rebuild kit..

http://www.mototassinari.com/images/stories/content/vforce3_page.jpg

ToraTora
07-18-2011, 01:58 AM
If you plan to use you bike on the street I suggest getting a lighting coil from HPI igintion to run your lights. Keep us updated on your progress.

I have the HPI system on my moped and the lighting coil is a total piece of crap. They have a new system with a bigger flywheel that I've heard works better. Still he could use the one off of his AM6 and it would probably be better.

The HPI is fantastic for spark though. :P


http://www.treatland.tv/v/vspfiles/photos/puch-HPI-CDI-with-light-coil-2T.jpg

http://www.treatland.tv/v/vspfiles/photos/puch-HPI-CDI-90-2T.jpg

littlefeller
07-18-2011, 01:29 PM
Thanks dude, you should.

Just ordered these, and a carb rebuild kit..

http://www.mototassinari.com/images/stories/content/vforce3_page.jpg

the optimum angle for a reed valve is 60 degrees

RS_Patrick
07-18-2011, 02:38 PM
Conti CRX reedcages are much better than the V-Force reeds, But i dont know if you can get them for your engine.

Way overpriced product, but seems people buy it because they think whats expensive must be good...

nidyanazo
07-18-2011, 03:38 PM
Ive heard alot of good things about the moto tessarini so I went with them. $125, no biggie. Better then stock, and apparently works great with the YZ engines.

I searched and did not even find any Conti CRX for my engine...

nidyanazo
07-18-2011, 04:11 PM
‪July 18, 2011 2:07 PM‬‏ - YouTube

nidyanazo
07-18-2011, 08:40 PM
‪July 18, 2011 6:19 PM‬‏ - YouTube

nidyanazo
07-19-2011, 08:45 PM
Don't know what happened to the damn audio, but here's the sprocket on and perfectly fit..

‪VID 20110719 144241‬‏ - YouTube

nidyanazo
07-19-2011, 10:00 PM
Well today's the tenth day working on this project, with an average of about 4 hours per day. I'm expecting the arrow pipe to arrive on thursday, at which time I'll take the bike to prime fabrication and have them weld it up, and lengthen the kick-starter and gear shift (it's gonna be a GP shift pattern!!).. Tomorrow I'll get the radiator plumbing all set, the new sprocket is on the wheel and I have the 520chain all ready. Just need to shorten it the correct amount. Things are really heating up!

http://img718.imageshack.us/img718/7290/img20110719144403.th.jpg (http://img718.imageshack.us/i/img20110719144403.jpg/)
http://img33.imageshack.us/img33/4278/img20110719144411.th.jpg (http://img33.imageshack.us/i/img20110719144411.jpg/)
http://img823.imageshack.us/img823/8920/img20110719144415.th.jpg (http://img823.imageshack.us/i/img20110719144415.jpg/)
http://img191.imageshack.us/img191/6285/img20110719144424.th.jpg (http://img191.imageshack.us/i/img20110719144424.jpg/)
http://img16.imageshack.us/img16/5457/img20110719144433.th.jpg (http://img16.imageshack.us/i/img20110719144433.jpg/)

xXxKillDogxXx
07-20-2011, 10:37 AM
Dammm i didnt get to hear ur beautiful mehcanical voice lmao great work

nidyanazo
07-20-2011, 07:35 PM
lol here ya go kill dog

‪July 20, 2011 4:04 PM‬‏ - YouTube

xXxKillDogxXx
07-20-2011, 09:18 PM
lol cheers haa cant wait to see it going gonna be a wheelie machine!

nidyanazo
07-21-2011, 10:47 PM
After a long day of work I got to ride it!!
I love this thing


‪First ride RSY125 no fairings on yet‬‏ - YouTube

scottydog
07-22-2011, 08:07 AM
Hey cool running there!! Want to do the same using a 80cc moto x engine down the road.

ToraTora
07-22-2011, 09:21 AM
Shit you got it running! Come on up to Laguna Seca on Saturday and hang out with the Bats, we'll be riding down from SF, and what a great event to christen such a cool project!

bikebike69
07-22-2011, 02:45 PM
Sounds like you have lots of power for sure,also sounds like you need to regear it a bit. Maybe a smaller rear sprocket by two or three teeth and up by one in the front. Allowing you to get more from each gear,common for a dirt to street swap. Throw some track plastic on that bad boy and bring it down to the streets of willow....ohhh yeah. BTW nice build.

xXxKillDogxXx
07-23-2011, 05:33 AM
That is epic proper awesome lol btw ur front tyre was a bit low in that video :D that engine fits just perfect me and you should race RSY125 Vs my Rs125 :D Game ON!

nidyanazo
07-23-2011, 02:43 PM
Thanks guys. Made some more progress, and Got an onboard video coming in a few mins..It's pretty good.
Unfortunately found out my fuel line was kinking up and starving the engine of fuel at high rpms. Fixed that with better fuel line, ant the bike feels great.
Tops out at at a speedo indicated 85mph, so more like ~78mph.. Could def. regear a few teeth smaller on the rear sprocket. The tires are shot so I was pretty haired on going too quick, so with some good sticky rubber I can tell it's going to be excellent. I got a racetech progressive spring kit ready to go on
https://lh4.googleusercontent.com/-vl_caXiPUwM/TisiYgdeNSI/AAAAAAAAACc/2wwActAGZEk/s1024/IMG_20110723_123236.jpg

a properly fitted K&N in the mail... The VFORCE reeds need to get installed..Got a new clutch kit coming because it feels like its slipping a bit...
..Guess thats all for now..

Here are a few more pics of the bike as sits today..

https://lh3.googleusercontent.com/-1O3wKjaXJ5s/Tisf5OEj4YI/AAAAAAAAACQ/9lCdLjFBlxs/s1024/DSCN3565.JPG

https://lh6.googleusercontent.com/-722c_Ah5UUo/Tisf0XX9fxI/AAAAAAAAACE/tj7tBhOkADo/s1024/DSCN3571.JPG

https://lh6.googleusercontent.com/-KwhEjHkplLc/Tisf0-O7-dI/AAAAAAAAACI/G9FhLToOpZ8/s1024/DSCN3568.JPG

https://lh5.googleusercontent.com/-tTDrS_CaNRI/Tisf4yBuOQI/AAAAAAAAACM/WBgN7baoFQ4/s1024/DSCN3570.JPG

nidyanazo
07-23-2011, 03:03 PM
‪RSY 125 RIDE UPLOAD‬‏ - YouTube

RS_Patrick
07-23-2011, 09:02 PM
Can you take some pics with the RaceTach springs and the Stock springs side by side? im wondering if there coiled difrently or if there difrent in some other kind of way.

nidyanazo
07-23-2011, 09:04 PM
sure when I get to installing them...

littlefeller
07-24-2011, 02:58 AM
well that answers a question i posted a couple of weeks ago, how much power can an rs 50 take, it seems a fair few ponies. cool

nidyanazo
07-24-2011, 10:57 AM
Yeah, although I'd love to have my cr250 engine in the RS, I don't think the bike is heavy enough.. The 125cc feels pretty good though

nidyanazo
07-24-2011, 04:03 PM
‪July 24, 2011 10:55 AM‬‏ - YouTube



https://lh3.googleusercontent.com/-_-7BkorDLoY/TiyH23t_aqI/AAAAAAAAAC8/doCqlETkZKY/s1024/DSCN3573.JPG

https://lh3.googleusercontent.com/-yN_KxL-G8mo/TiyH24tv1uI/AAAAAAAAAC4/JgAsd5KQVNE/s1024/DSCN3579.JPG

https://lh5.googleusercontent.com/-J7iWyTSzJsE/TiyH7REfdaI/AAAAAAAAADM/WT3cpAAeBMw/s1024/DSCN3576.JPG

https://lh4.googleusercontent.com/--X2jzJlDAJY/TiyH9nppIBI/AAAAAAAAADQ/2-1HKORLA-4/s1024/DSCN3580.JPG

https://lh6.googleusercontent.com/-CLy2cWnPYBk/TiyH9_BCneI/AAAAAAAAADU/TitXEVq1SwE/s1024/DSCN3575.JPG

xXxKillDogxXx
07-26-2011, 05:58 AM
Take that dam yamaha sticker off the rs lmao

nidyanazo
07-27-2011, 06:04 PM
Take that dam yamaha sticker off the rs lmao

Hell no, it's heart is a Yamaha! :devil:

littlefeller
07-28-2011, 12:40 AM
i spent many years racing and riding yamahas, there the king of strokers, i thought the am6 was based on a yamaha design. after rebuilding mine i was amazed how yamaha ish it all was

nidyanazo
07-29-2011, 03:16 PM
‪July 28, 2011 7:12 PM‬‏ - YouTube

RS_Patrick
07-31-2011, 05:29 PM
i spent many years racing and riding yamahas, there the king of strokers, i thought the am6 was based on a yamaha design. after rebuilding mine i was amazed how yamaha ish it all was

Had a RD, just stripped it and scrapped it, but no the AM-6 is not based on a Yamaha design.

nidyanazo
08-01-2011, 02:39 AM
‪Aprilia RSY125 launches and quick shifts no fairings on‬‏ - YouTube

littlefeller
08-01-2011, 02:43 PM
Had a RD, just stripped it and scrapped it, but no the AM-6 is not based on a Yamaha design.

am6 looks very tzr to me (im not thinking the tzr50)

nidyanazo
08-04-2011, 11:23 PM
‪More updates on aprilia rsy125‬‏ - YouTube

https://lh6.googleusercontent.com/-d8qrK7FI738/Tjtwkd9l2YI/AAAAAAAAAEY/G3MVxSsZZjU/s720/DSCN3678.JPG

https://lh3.googleusercontent.com/-mGvnf--5cgc/TjtuN_Ak97I/AAAAAAAAAEQ/KvOe9XmnTpo/s720/DSCN3683.JPG

https://lh4.googleusercontent.com/-2hdPfElmQbY/TjtuNo528oI/AAAAAAAAAEM/szZBlrvylLo/s720/DSCN3685.JPG

nidyanazo
08-06-2011, 10:18 PM
‪RSY125 fast runs‬‏ - YouTube

rs250lape
10-06-2011, 12:03 AM
that is great i am looking for a rs 50 donor to do a swap also do you have any instruction on what you did to fit the motor and also this will be my 1st bike and have been after a 2stroke street bike forever. .. I also have a question i am 155lbs if i was to get a 50 with the bbk on it will that get up to 70-75 mph and is it safe to run at that speed for a long period of time.

RS_Patrick
10-06-2011, 05:56 AM
that is great i am looking for a rs 50 donor to do a swap also do you have any instruction on what you did to fit the motor and also this will be my 1st bike and have been after a 2stroke street bike forever. .. I also have a question i am 155lbs if i was to get a 50 with the bbk on it will that get up to 70-75 mph and is it safe to run at that speed for a long period of time.

You should ask this in the RS50 tech section, but yeah a big bore etc will get you to 75mph no problem, with verry quick acceleration with out any problems.
Mine ran athleast 85mph for most of the 12 years ive had it.