400 head valve adjustments

hey i out a heads off a 99 yz400 on my 2002 yz426...got it all together and she ticks pretty loud...it starts on 3rd kick everytime, but is the ticking a sign that my valves need adjusted? Also if so, anyone know the correct specs for a yz400f and the cheapest place to get shims if i need em? thanks alot

Intakes: .10-15mm

Exhausts: .25-.30mm

The shims are the same as for any YZ4xx, and also the same as those for a CRF450 (9.48mm diameter).

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