so my setup:
1995 tomos A35
Treats People 70cc Puch piston port kit (non-reed)
Mikuni VM20
stock tomos 50cc head
no port work, just threw the kit on
bi-tubo pipe with gutted silencer
brand new cdi coil from tomos
10w-40 in crankcase
diagonal slits cut into clutch cork
8 heatrange NGK plug
109octane gas
32:1 ratio blendz-all green castor oil
stock gearing
so, we've been dicking with this thing for a while trying to get it dialed in JUST right and its really getting old
ive got a 140 main jet and my needle clip is at the top (needle all the way down)
with the air filter on, up top it starts to 4-stroke out... almost like a revlimiter type deal, but if i back off the throttle a little bit, the 4-stroking goes away and the bike continues to accelerate. it takes a while for sure... its a slow acceleration, but you can hear it.
i thought at first that maybe i was actually too lean and the backing off the throttle was restircting the amount of air getting in, thus richening the mixture, but when i jet up.. even just to a 145, it worsens. alot.
i think whats happening is when i back off, im actually just letting the needle down and helping to lean it out.
when i pull my airfilter off, i get virtually no 4-stroke (just the occasional pop here and there) and the bike hits 46mph with me in full tuck.. mind you, i also weigh 209lbs.
i mean really... 135 jet? that sounds super lean to me. the plug always looks fine, never lean.. even so, i could get away with it abit with the 109octane i think.
thoughts?
