Hey ya'll, I have an '82 xr200r that died awhile back, and on teardown found multiple probs., two broken gears, and the cam and bushing were scored badly. I scored a 200 from an atv 200 that had new bearings, crank, piston rod, piston, bearings, etc., story was it wouldn't shift and he gave it to my cousin in disgust. Basically I used my gears and cylinderhead, and bought a new cam and bushing. Upon reassembly, it starts with one kick, but smokes alot and there seems to be alot of black oily blowby...I did lube the cylinder with white grease before inserting the piston, and thinking about it now, the piston went in easily...maybe too easy? Questions now occur as to piston size differences in a like-year model atv 200 and my xr200r piston. Anybody got any suggestions on my next move with this thing?