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  1. #1

    Join Date
    Feb 2007
    Burbs of Chicago

    Kwai 650 sx build needs tuning help

    Last year I built a 650sx. Put sbn carb, pipe, intake, exhaust mani, dual plumbing, etc. It run pretty good until the throttle is wide open. It runs the fastest at 3/4 open. When wide open, it bogs a little. Seems like it needs more fuel? Can I adjust the screws or does it need new jets? I have never messed with a carb so some specific details would be greatly appreciated.


  2. #2
    Myself's Avatar
    Join Date
    May 2007
    North Central Arkansas
    Open the high speed screw (closer to the top) about 1/8 turn and see if it gets better.

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