It messed up the crank shaft. Harleys have a very soft crank for some reason. The SC actually never got hot. It would sweat from the cold air going through it. It ran off of a gear bolted to the crank, and the bolt broke and rounded the end of the crank ("D" shaped from the factory). It was a blast when it ran right! I could match just about any crotchrocket red light to red light.