Hello all. I'm a long time reader, first time poster. My wife and I are avid riders on both dirt and pavement. For the dirt, she rides the TW200 and I ride a CRF230F. I saw a 1991 TW on craigslist for cheap and decided I buy it, steal the tires for my wife and resell it. It needed cosmetic work, so I figured I'd pretty it up and maybe make a profit. Well... I don't think that's going to happen. The clatter I thought was cam chain or valves is something more. I'd like some opinions on whether or not I need to tear it down further after I replace the piston and rings - and maybe the cylinder. It kind of sounded like it had a rod knock, but the rod and wristpin feel solid. That's a chunk missing from above the top ring.