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Watts Racing

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About Watts Racing

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    TT Newbie

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  • Location
    South Dakota
  1. Watts Racing

    Yamaha Jetting way off

    My YZF 450 has a HMF Ballance full race pipe. K&N filter with Pro design adapter. The motor is stock. I'm riding @ 4,500 feet in SD. This weekend I installed as suggested a james Dean jet and needle kit. I went with the Red needle with the clip in the 5TH position from top. A 165 main and a 45 pilot. It seems to be way rich from 1/4 throttle to 7/8 then seems to be ok at wot. Do you think I can clear it up by just a clip adjustment on the needle or do I have to go to a leaner pilot jet? Thanks for any help.