Do i need to change jets?

I just got my '04 WR450F last week, I ordered a GYT-R muffler & header pipe, and yz throttle stop. I will also be removing baffle out of air box. My question is do you think I will need to change the jets?

Prob'ly....

Buy the JD jetting kit from this forum's TT store and get a 72 starter jet and a 48 pilot jet for colder weather. :)

I ould do it.

Thumper Talk sells JD jetting kits, I hear they are the hot setup.

Thanks Indy, I will try that.

Are you riding at sea-level? Im using a 168 main, w/ a YZ needle. Good results thanks to JD.

Yes, I am in Port Jeff. Do you think the 168mj will work as well for a 450?

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