I'd like people's opinions on the frequency of replacing the crank & bearings on a 2 stroke bike. :coocoo: I have a 2001 Honda CR 250 that has roughly 180 hours of riding on it. It has always run like a champ. I clean the air filter just about every ride and change the transmission fluid evry 2-3 rides. While not experiencing trouble, how do I know whether the crank and bearings are still sound? Doing top end jobs I check for vertical movement of the rod and there is none. I want to keep this bike and treat it right to prevent expensive damage. Any comments would be appreciated. :)