JD Jetting installed today

1 reply to this topic
  • un chained

Posted June 26, 2013 - 06:19 PM


My 02 WR 426 with YZ cam timing, GYTR head pipe and a YZ muffler was lean and ran pretty rough with stock WR jetting. Got the JD kit and did the red needle (5th clip), 42 pilot, 168 main and fuel screw at 2 turns. Also put the heavy o-ring around the accelerator pump arm. She starts, idles and runs excellent and lights up hard and fast now. Your basically paying $75 for just a needle but overall, it's money we'll spent so far. Can't wait to roost some sand and hit the single tracks next week in northern Michigan...

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  • L. Euler

Posted June 28, 2013 - 04:47 PM


The JD kit had the same effect on mine. Amazing difference.


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