Jetting with Yz timing , whose running what?

Post your jetting with Yz timing and elevation and pipe/header combo. Looking for who has the best set up at different elevations.


'01 WR w/ R series exhaust AND '01 with stock uncorked, both with same jetting (may be slight difference in fuel screw).

4,000 ft. to 5,000 ft. + elevation

SW desert, 75 to 100 degrees w/ ~ 30% humidity 90% of the time.

EKQ #3

160 main

40 pilot (this may go to 42 in the winter)

PAJ 75-85

200 MAJ

Started out at 1.5 turns out on fuel screw and fine tuned from there, I think both ended up a tad richer here...

BTW this is identical to jetting in my '01 YZ w/ a TA. Versus the stock exhaust all I did was richen the fuel screw a bit. Also, the uncorked WR is YZ timed, the one w/ the R series has WR timing.

Hope this helps.

See my sig....


'98 WR400 throttle stop off, lid off, White Bros. E-series pipe, flywheel weight, 172 main jet, stock all else, at about 1,000 feet above sea level.

See my Sig.Sea level to 6KSoCal

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