ok so heres what i got, its a crf50 that i put in a 90cc yx motor, before this motor i had a 88cc TB race head kit. i am using that shengway that came with the kit, now that carb ran some what decent on that kit so i know the jetting for the 88 motor was ok, it was running the stock crf50 exhaust as well. well i had a few hours free so i installed the yx90cc motor in the 50 with a new fmf power core 4 exhaust (28mm it looks like)and through the 20mm shengway back on without changing any settings, at first the motor fired up and idled decently and reved freely, after letting it idle for about 1 minute, maybe 2, it died, and would not really kick back over. so i put the choke on full, and gave it 1/4 throttle while kicking it and this would get it started back up, but would then die out if i let off the throttle one bit. if it did die out it would take another 4 or 5 kicks with 1/4 throttle and choke on full to get her going again but as soon as i would let off, she would sputter and die.
now i am no certified genius but to me i think that it sounds lean on pilot and main. i didnt have time to pull off the carb bowl to see what jets are installed and i know i should have but does anyone have a base line or idea what jets i should be running. i tired to google search it and i found a guy whos story is simillar to mine only he had a lifan 90cc motor and same shenway carb and similar exhaust and he was running a 95 main and 38 pilot.
i am at sea level nearly, maybe 50 feet above, i am running a 20mm shengway (the one that comes with the tb88 RH kit), i am running a fmf power core 4 exhaust, and i am using a yx90cc motor with e22 head. bike now only starts with choke on full, but still dies out...
since the carb was dialed in decently with the 88 kit with stock crf 50 exhaust, it makes me thing it had the recomended jetting from TB. i figured the yx 90 wouldnt be too far off from jetting. i guess i was wrong, way wrong.
if anyone else has a similar china 90cc motor, what carb and or jets are you running?
now i am no certified genius but to me i think that it sounds lean on pilot and main. i didnt have time to pull off the carb bowl to see what jets are installed and i know i should have but does anyone have a base line or idea what jets i should be running. i tired to google search it and i found a guy whos story is simillar to mine only he had a lifan 90cc motor and same shenway carb and similar exhaust and he was running a 95 main and 38 pilot.
i am at sea level nearly, maybe 50 feet above, i am running a 20mm shengway (the one that comes with the tb88 RH kit), i am running a fmf power core 4 exhaust, and i am using a yx90cc motor with e22 head. bike now only starts with choke on full, but still dies out...
since the carb was dialed in decently with the 88 kit with stock crf 50 exhaust, it makes me thing it had the recomended jetting from TB. i figured the yx 90 wouldnt be too far off from jetting. i guess i was wrong, way wrong.
if anyone else has a similar china 90cc motor, what carb and or jets are you running?