Ive searched all the other threads (several times ive been working on this poblem for 4 weekends, i know how sad that is). I have a schwinn clairmont cruiser with a grubee 48cc 2 stroke on it. Everytime I fire It up and start riding it, it will only go about a hundred yards before the wheel locks up and i have to practically carry by bike back to my front porch. When i look at it, everytime the chain has come off the engine sproket inside the clutch housing and gotten jammed and typically snapped part of the chain. Eve aligned and realigend the sprokets several times. I do notice that when i first put the chain on the bike its nice and tight at the top but after i pop the clutch and ride it for a minute the chain is looser at the top (maybe this has to do with the moment i pop the clutch, the rear will is spinning while the engine sproket hesitates before starting?) I just cant figure out how or why its coming off the engine sproket when everyone else seems to be having problems of theres coming ogg the wheel socket? any help would be greatly appreciated, im up in Jersey and im running out of nice weather days to work this out and ride it..
-jen
-jen