Hi, I recently inherited a 2004 RM250 that does not start. I took it apart and the piston has some serious ring damage. I think it was caused by damage to the cylinder which caused the rings to get stuck and break apart. I am sending the cylinder to Powerseal for repair and replacing the crankshaft, but is there any thing else that may have caused this that I need to check into before reassembly and running it. So it does not happen again? THANKS!