View Full Version : project finished soon

01-11-2013, 04:53 PM
ok so im new here ive basicly finished my project but to fit in wanted add pictures :P
may need help seting up the carb ill see when i start it up and running properly
anyway heres some pictures
heres before i crashed
now i have to just get mot when one more part comes
jobs done small bit of wiring
helicoil in gearbox draining thread
fork serviced
visual inspect through everything cleaning and you know what im getting to :)

01-11-2013, 05:41 PM
Coming on well. What performance upgrades have you got on?

01-11-2013, 05:55 PM
fuck all mate not enough money just crashed really badly any nearly done heyho maybe when moneys one of the better thing might go for a new racing crank and top end so right now just want to make legal :)

01-12-2013, 04:34 AM
Well if you have no upgrades you should be fine with the stock carb, however if you do put on, for example, a performance exhaust, make sure you upjet the carb to about 92. If you don't your bike will run lean causing friction all over (between piston and bore especially)

01-12-2013, 04:40 AM
yeah well i didnt have it for long on the road :L so i mean i was struggling to idle at 1500 revs before thats the case im getting to the exhaust is standard and the thing pulls about 60 on the speedoi mean like what a matter of 3-4weeks

01-12-2013, 09:53 AM
Ash Dont forget to post what carb you've got on there! Will help you get a correct reply to what main jet you need in there.

01-12-2013, 11:15 AM
Yes Nick is right, I was just assuming you had the standard one on there!

01-12-2013, 12:39 PM
Easy way to tell what carbs also i may add, on the Sha carb you DO NOT have a rubber manifold(into reed side NOT airbox) with the new PHBN 16 carbs it HAS a rubber manifold and the size of the external where the carb fits onto is about 35mm and the SHA carb is around 60mm! Ther do also say on the carb body just above the bowl on a little flat piece! Assuming every things standard that is, and USUALLY , SHA carbs 1999-2003 PHBN 2004/3-2005/6

01-12-2013, 04:01 PM
yeah not good with carbs at all ill get a picture and stuff tomorrow when im out there just got back from work so didnt have time today and also i dont have a rubber manifold rs_roadrage but just thing it needs maybe jets or somthing as it has a shity airfilter struggled to get the airbox but hey well see tomorrow :)

01-12-2013, 04:56 PM
sounds like you have the dellorto sha 1412 carb, no need for pics just have a look on the side of the carb and it will tell you ;)

if your running it with a open/cone/k&n style filter then you NEED to upjet a fair bit to match the increase of air. if you run it with stock size jets and run a open filter its going to run really lean and cause damage to crank bearings, cylinder, piston internally

we cannot tell you the exact size jet to fit because its always different even if someone had the same set up as you because it also depends on climate and see level ect ect. however we can give you a good starting point if you give us full details of your set up (top end (cylinder) / airbox or filter / current jet size / carb / exhaust and so on)

stock jet size for the dellorto sha carb is 63

you need to upjet around 10% give or take a couple of sizes when derestricting it or fitting a race exhaust

if you have a decent carb you will also have mixture screw, needle clip settings ect

01-12-2013, 05:03 PM
so i would need a pack of jet size range from 80 to 110 or somthing

01-12-2013, 05:07 PM
with a open/k&n/cone/pod style air filter then yes your on the right sort of lines there..

with the airbox fitted, stock derestricted then merely 65 - 72 would be on the right sort of lines.

that is the effect of a cone/pod/foam filter because they increase airflow so much so you need lots more fuel (no real performance gain with the RS50 though)

01-12-2013, 05:09 PM
i didnt want the k and n filter only thing i had could somone show me a pack of jets i would need for under 10 ?
thanks i appreciate the help

01-12-2013, 05:51 PM
it may be worth you hanging on and buying a second hand airbox off ebay, easier to re-jet to a airbox and more reliable with the UKs weather

01-12-2013, 06:01 PM
hmm money just really tight rejetting will be easier atm and dont know how long im keeping her for should i take the jet out tomorrow check whats in there first its had 12 bad owners

01-13-2013, 04:05 AM
A k&n filter will just make it a pain in the arse, i was going down the same route as you when i got my rs, i soon realised that the airbox was a better idea and made jetting SO much easyer and starts first time in all weathers

01-13-2013, 07:09 AM
i know what you mean ill check whats in it today and if i can give it a run as my dad will moan as its sorn at the moment and check the plug ill get back to you when ive done that

01-13-2013, 08:35 AM
hi guys ive had the plug out http://imageshack.us/photo/my-images/204/img00046201301131317.jpg/
is this the right plug br7es or something for a deristricted rs
and the main jet is 63

01-13-2013, 12:05 PM
if its had 12 bad owners i would check and re-check everything

'hopfully' if it is derestricted then it has also been upjetted.. otherwise it will have been running real lean and causing damaged internally to crank bearings, cylinder and piston.

so yes the best thing to do is take it out and see what size it is, work from there.

(even if it has been upjetted once derestricted you will still need to upjet to match the big increase of air from the cone filter)

but in the future, should you decide to keep onto it then you would do better with a stock airbox if you can find one on ebay.

01-13-2013, 12:09 PM
your other replys have just come up for me..

we need a clearer picture, but from what i can see of that one the tip of the electrode looks a bit white

63 is stock jet size, once derestricted and using stock airbox you will need to upjet around 10% give or take a few sizes depending on location.. an anything between 65 - 72 should be right. so with a open/cone/pod filter your looking at 78+ above.

the right spark plug for a derestricted RS50 is BR9ES! even the restricted models use a BR8ES

01-13-2013, 12:23 PM
thanks and i took it for a quick ride and spark plug is black and half of it is a coffee brown coulor that it should be
how ill i know if its jetted right and so get 80 +jets and try them

01-13-2013, 12:59 PM
the electrode looks like it has a bit of white (or at least very light in colour) towards the tip.

when re-jetting you are best fitting a jet which is a few sizes bigger than what you think is going to be correct, you then take it for a run up the road over and over whilst jetting down a size or two on each interval and checking the spark plug electrode colour (should be a dry coffee brown colour throughout). you do this until the bike starts to respond properly and the spark plug colour is right, you want it to start/respond/run well and the jetting is crucial. this way it never runs lean, just a bit rich until you come down to the right size.

the main jet is only in control of full throttle fueling, so if mid range is a bit dead you may need to adjust other settings on the carb to remedy this like mixture screw and or needle clip height (something you cannot do with the dellorto sha 1412 carb)

01-13-2013, 01:48 PM
ive found it runs nice just kinda shit when not in the powerband but its a 50cc soo ill grab new plug tomorrow but are you saying the jet that needs to be changed to get it to idle easier and to get the plug to a coffee brown colour so its heathy

01-13-2013, 02:30 PM
if your bike is idling at 1500rpm it shouldnt be struggling, do you have plenty of compression? anything between 100psi to 120psi is good

01-13-2013, 02:46 PM
got the bracket coming so ill attatch the clocks when it comes take it for a mot and then check everything when i can take it to work

01-13-2013, 04:27 PM
get the jetting close before MOT, you dont want to be running it lean ;)

01-14-2013, 02:09 PM
no im pushing it cant afford insurance at the moment