Alright, i'm gonna sorta keep this short cause i've typed this a few times already, and am getting a little tired of it. Anyway, here we go. Like an idiot (this is my 4th bike) i forgot to tighten the axle bolt. Well, axle shifted forward, chain came off and jammed, big time. It stopped the engine very quickly, and now it won't turn over. I can rotate the engine backwards, then forwards again, but it hits the spot (roughly) where it was before and it'll stop dead again. I drained the oil and pulled the clutch cover, and fly wheel cover, nothing obvious. Anyone want ot give me an idea where to look?