Well first off its a 200 and it's either top end went, crank bearings blow, crank melted itself due to running lean or no oil in tranny or the fly wheel is caught up. But first things first build or buy a leakdown tester and see if there's any air leaks causing any of these problems. Then proceed to disassemble engine start off taking stator cover off looking at fly wheel and then remove top end and inspect that if piston shattered or broke whole engine must me taken apart inspecting everything for damage and removing fragments. If either one of those time inspect crank and/or take bottom end apart.