Fuel Mixture Screw 3 Turns Out?

I own a 2007 WR450. The directions from the AIS kit tell me to use the stock main jet 162 and a 48 Pilot with the mixture screw 3 turns out.

It runs great. My question is this: Should I go one up on the main or the pilot to get to the optimum of 1-2 turns out on the mixture screw?

I have always heard that if you have to turn the screw out 3 turns, you need to go one up on either the main of the pilot. Can someone please clarify this?

Thanks a lot.

Pilot....

UP the pilot. You may also look for a vacuum leak since you have been messing around with the AIS. a vacuum leak will cause it to be lean at idle. check the system carfully before changing the 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