400 exc engine updates from 2001 - 2002

I noticed that the 2002 has a o-ring on the countershaft and a new clutch driver. Where these big problems on the earlier models, was heat dissipation a problem, how does the '01 model do on tight slow sections? any overheating- boilover? clutch weak?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now