I have 2006 350 Rancher 4x4 it is ready for third overhual, first was warranty second one Honda refused I paid it lasted 3 months wrist pin worn out allowed piston to get into cylinder. It appears bore will clean up ok. Don't understand why writst pin wore so badly. No evidence of water or debri in oil. It was changed 2 times during the period and full when compression got so low it would not start. Rings stuck when piston contacted wall.