Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0

Jet question? WR450, What to start with?

1 post in this topic

Stock Jet needle is position (JN) = OBDUT-4 I think. I am at 800 ft., and 20 to 40 F. I have ridden the bike once, and it was great except it still has an off idle bog. I have not been on a track yet, just in my yard, but don't want thet off idle bog!!!! When I had a 2000 YZ426 that OFF IDLE BOG thru me over the bars in a set of 6 large woops. :)

I have ordered the following Jet Needles:

5NL-14916-EN-00 (#OBELN) for YZ250F 2003

5TJ-14916-D1 #DUQ From my manual for richer jet.

5TA-14916-JN-00 (#NDJN) for (YZ-450F) 2003

might try: NCVQ-4 or 0BDRR-4....

I have also ordered the #100 PAJ and a #72 chock jet. I know the #72 chock jet will not help my problem, just thought I would get it Cause UT says it helped his starting.

When these jets come in, what order should I change them out?

I know Taffy did a lot of testing on jetting on the 426 hope he sees this post. When the snow and rain quit and the jets get to me I will be testing these. How to go about it is the real question?

Share this post

Link to post
Share on other sites

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
Sign in to follow this  
Followers 0