Any WR400's with FMF Powerbomb header and JD jetting?

Need a little jetting advice for my WR which has an FMF Powerbomb. Blue needle in 3rd position is coughing at about 1/3 throttle. I'm at about 700ft above sea level.


That would be me.

I will look into my carb settings, but basically they are stock all round except the needle and the

main jet which is a 168 I think. Dont look at my signature, its not updated.

I run a powerbomb + CRD (french < 94dB) pipe which is not as free flowing as it could be!

I also ride a little higher than you though 1800 feet to 4000

Ive have the same setup as you.

I rode last weekend at about 2-3000ft and noticed the same coughing as you. I think its a little rich.

My main is a 168 and I'm running the blue needle. I gotta check the clip. 3 or 4 but don't remember. I use a power now so my pilot is a 40.

I'm going to change to the red needle and see what happens.

below are my settings. I am stock other than what is specified below. Seems perfectly dialed for about 1000 feet and 70 degrees. Hope that helps...

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