bclapham
LIFETIME SPONSOR
- Nov 5, 2001
- 4,340
- 0
OK, call me obssesed, or just call me a freak, i am still messing with the carby on this rm144.
to cut a long story short, the stock mikuni carb was just too rich at the lower to middle throttle positions and i still havent managed to get it leaned out- it runs well, but i think it can run better and the spooge embarases me also. so, ive swapped the stock 38mmTMX for a brand new Keihin PWK 38mm airstriker...but i cant get the bike to run properly at all.
ive tried every thing, from 40-55 pilots, and about 10 clip positions using the stock needles from rms that ran the PWK and also some of the richer needles from a ktm and also from 160-180 main jets and the floats are set properly too. no matter what i try, if i crack the throttle open real quick the bike bogs real bad. it seemed to be better with richer needle settings, but it was still bad and also blowing oil out the back.
i am using the #6 slide, and it did seem to get slightly worse when i ran a #7 slide. the older rms ran a #6 slide.
ive also tried an older used 38mm PWK that has been sleeved down to 36mm, same deal, it just bogs real bad. ive asked lots of people, and ive run the bike back to back with the stock carb and it runs ok so i dont think there is an air leak etc. the place where i have been testing is about 4000ft and 100F but the bike runs there OK with the stock carb (back to back)
i cant understand why the carb isnt working, i met someone at the track a while back and he has put the keihin on their 02rm125 with excellent results, murphys law that i havent seen him since to find out more!
so has anyone got any ideas? steve and eric think it might be the v-force and they could be right, but why would it run OK with one carb and not with the other? eitherway, i hope to be putting the stock reeds back in soon!
and i should mention, the only mods i did to the carb were just taking 2mm of the front spigot so it would fit in the boot properly!
so put your thinking caps on gentlemen.
thanks bruce
to cut a long story short, the stock mikuni carb was just too rich at the lower to middle throttle positions and i still havent managed to get it leaned out- it runs well, but i think it can run better and the spooge embarases me also. so, ive swapped the stock 38mmTMX for a brand new Keihin PWK 38mm airstriker...but i cant get the bike to run properly at all.
ive tried every thing, from 40-55 pilots, and about 10 clip positions using the stock needles from rms that ran the PWK and also some of the richer needles from a ktm and also from 160-180 main jets and the floats are set properly too. no matter what i try, if i crack the throttle open real quick the bike bogs real bad. it seemed to be better with richer needle settings, but it was still bad and also blowing oil out the back.
i am using the #6 slide, and it did seem to get slightly worse when i ran a #7 slide. the older rms ran a #6 slide.
ive also tried an older used 38mm PWK that has been sleeved down to 36mm, same deal, it just bogs real bad. ive asked lots of people, and ive run the bike back to back with the stock carb and it runs ok so i dont think there is an air leak etc. the place where i have been testing is about 4000ft and 100F but the bike runs there OK with the stock carb (back to back)
i cant understand why the carb isnt working, i met someone at the track a while back and he has put the keihin on their 02rm125 with excellent results, murphys law that i havent seen him since to find out more!
so has anyone got any ideas? steve and eric think it might be the v-force and they could be right, but why would it run OK with one carb and not with the other? eitherway, i hope to be putting the stock reeds back in soon!
and i should mention, the only mods i did to the carb were just taking 2mm of the front spigot so it would fit in the boot properly!
so put your thinking caps on gentlemen.
thanks bruce