Jd jetting issue. Insight appreciated.

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  • bultaco

Posted September 20, 2009 - 02:55 PM


Have a 99 WR400. JD jetting installed. Blue needle, 170 main jet, 3rd clip for sea level to 4,000 ft. Live in coastal California. Also installed all new jets, AP unit with longer prong...thus shorter squirt.

Stock settings: My settings:

Main jet 168 170
Pilot jet 45 48
Needle jet standard standard
Pilot screw standard


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