2007 Yz 450f

I have a 2007 Z 450F with a 165 main jet.

The bike popped alot on decell with the stock 160.

Bike runs very well but the pilot screw makes no change when going all in.

Do I need to change another jet?

Thank you

main jet has nothing to do with any thing that happens with the throttle closed.

if the bike idles with the fuel screw full closed you need a smaller pilot jet.

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