Re: Rear wheel locks when disengaging clutch, no engine start is this normal?
SOUNDS LIKE MAYBE A HUNG RING. (sorry damn caps). Yank the head and carefully pull the cylinder and see if you have a broken or unseated piston ring hanging up on one of the ports. If so then you'll need th replace the top end or get a replacement from your dealer. If that aint it then you might have a dangling rod bolt.