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Thread: Carb Questions

  1. #1
    1131 Adam E.'s Avatar
    Join Date
    Oct 2009
    Fort Bragg, NC

    Carb Questions

    I will be running an 85mm bore cylinder, 140 PSI, with flame arrestors on my GP1200.

    1.Will I have to rejet?
    2. How do I determine if the N & S are O.K.
    3. What spring is used on this unit?

  2. #2
    Moderator OsideBill's Avatar
    Join Date
    Mar 2006
    United States
    I would rejet to 100 lows on all three, keep the highs stock at 135.
    1.5 N&S gold spring 55PSI pop off.
    start at 1-1/4 turn out on all low speed screws and 1 turn out on highs tune in from there.

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