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Thread: Needle adjustment

  1. #1
    Join Date
    Feb 2007
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    Needle adjustment

    When I was playing with the jetting on the 50 I put the needle 1 click under the stock setting. It ran great in the mid but suffered in the top end.

    Is there a way to combat this with changing the main jet? It would scream from 1/4 throttle thru 3/4 throttle. But would kinda bog down with full throttle. I let off the throttle a little and it started screaming again.
    Raptor 250
    Zachary #80Y


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  2. #2
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    now try the main
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  3. #3
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    is that the kehin carb 20mm?

    marc
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  4. #4
    Join Date
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    Yes. Keihin PE20
    Raptor 250
    Zachary #80Y


    2006 TRX 450ER

    911 Motorsports
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    Vertex Pistons

  5. #5
    Join Date
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    Sounds like you are too rich on the main jet...Needle is for mid range....

    try dopping it down to like a 95 MJ.....Stock in the PE20 is a 100 I believe
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