Jet question? WR450, What to start with?

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  • Motorod

Posted February 15, 2003 - 08:23 PM


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?


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