Found a hole adjacent to cylinder 4 (middle port). Completed teardown this afternoon and the piston barely resembled a piston. Aparrently, the seal ring pin busted, the ring caught the exhaust port and then the fun began. Everything other than the 4th cylinder is pristine. From what I can tell, I need a piston (duh), a sleeve (slight crack - no scoring), head cover, and reed valve (lots of piston chunks wedged). Am I missing anything else? Could the exhaust be blocked at all from small chunks of the piston? Motor was running fine prior and just started running a little rough.
