Hey Gang, I need some help identifying the cause of a detroyed piston. I wrode my new to me 2002 WR 426 last weekend for 30 min. and the motor just locked up. I couldn't kick it past TDC. When I tore it apart I found that a relatively small piece of the piston blew off, and left molten aluminum stuck to everything... head, valves, piston, cylinder. The piece came off on the outside diameter of the piston just above the rings. The rings appear intact and the piston was not seized to the cylinder , once I removed the head and debris the piston moves freely in the cylinder. I am thinking that it must have overheated because there is molten metal stuck all over. Is it the oil flow, the coolant flow, piston, something else. I have never heard of or seen anything like it. Fluid levels were OK and the bike supposedly only has 60 hrs or so. I tried to attach pictures as they would help greatly to explain, but they are saved on my PC and it is asking for my URL, and I'm not sure how to attach(direction on this would help). Thanks for your help!