Was running fine really been getting harder and harder to start and while riding it just bogged down and was making a knocking noise pulled the head off when I get it home and the posted was scored pretty bad on one side and had some melting on the other side I'm not sure what would cause this was wondering if anyone could lead me in the right direction before new jug and Piston so I don't get this issue again it's a wiseco 72.50 piston and the rings where like stuck flat so wonder if it just got some slack from seized rings ? Idk