My bud has an '03 700. Cudney clutch kit, DynoPort can and around 1200 miles. His engine blew at 48 miles. Dealer installed new. Ever since the change if and only if, the engine gets hot, it won't run worth a crap over 7K rpm. He can run all day long under that and it is fine. He change to the stock can and same problem. If the engine is cool is runs like a rocket. Could it be the clutch kit? It is the only thing not changed back to stock. I thought maybe the secondary spring.....??? Or a carb issue.