Jetting for piston and pipe 2008 YZ450F

I moved from Colorado to Florida.

Bike has a 13:75 to 1 piston in it with a DR. D pipe.

I am now at sea level.

Problem is i need to rejet.

I had a 162 Main

48 pilot.

Put a 45 pilot in and a 178 main THAT didn't work

Only works good from 1/4 throttle to 3/4 throttle

I think i need a 164 to 168 main and a 48 pilot.

I want to get it close so i only have to pay for 1 dyno run to have final check.

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