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Thread: 125M carb adjustments

  1. #1
    Woodsrider's Avatar
    Woodsrider is offline At The Back Of The Pack Arm chair racerFirst time rider
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    Feb 2009
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    125M carb adjustments

    I've searched my manual for the settings for the pilot screw and the idle stop screw....and even though I can't imagine a proper manual without this info, I can't find it. I'm trying to get my '84 125M going...I cleaned the carb and put it back together just like it was, but she won't run.Maybe the previous owner messed with the settings. She will start if I close the choke and give it full throttle, but it will only run for a few seconds. I'm hoping it's just a simple carb adjustment. Does anybody know the factory settings for the screws?

  2. #2
    Join Date
    Dec 2008
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    Monroe MI
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    5,787
    From the Clymer manual.
    Attached Thumbnails Attached Thumbnails Image1.jpg  

  3. #3
    Woodsrider's Avatar
    Woodsrider is offline At The Back Of The Pack Arm chair racerFirst time rider
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    Thanks a lot ! The pilot screw is about 2 1/4 turns out on my carb instead of the 1 3/8 turns in your manual. That could be my problem. Thanks again.

  4. #4
    Join Date
    Sep 2009
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    Ireland
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    89
    Just finished looking that up for my 110 - says:

    1 adust the throttle stop screw to obtain the lowest stable idle rpm.
    2. turn the pilot screw clockwise until you hear the engine miss or decrease in speed, then counterclockwise until the engine misses or decreases in speed.
    Centre the pilot screw exactly between these two extreme positions, at the point which produces the highest idle rpm (usually 1-5/8 turns out from the closed position)
    Note turning the pilot screw in produces a leaner mixture, out a richer mix.

  5. #5
    Woodsrider's Avatar
    Woodsrider is offline At The Back Of The Pack Arm chair racerFirst time rider
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    Thanks guys...I set it at 1-3/8 tirns out and she started up on the second pull,and every time after that she has started up on the first pull...that's all it was. I appreciate the help..thanks again.

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