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  1. #1

    Gp1200r plug diagnosis

    I finally got my ski out for the first time after a full rebuild. The ski runs great for the most part but I am getting some hesitation off idle. Sometimes I have to feather it just a bit then runs great. After about 20 mins of riding I pulled the plugs and seem like they are 3 different colors. Can anybody tell me what these plugs mean?
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  2. #2

    Join Date
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    What are your carb settings?

    Usually, the plugs look similar. Kinda looks like you have one lean cylinder.

    Did you do a plug chop, or pull plugs after riding 20 minutes?

  3. #3
    Everything is stock on the ski. I just pulled the plugs after 20 min of riding

  4. #4

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    Ok, so you never installed t handles on the high and low speed adjusters? These skis are known to run lean from factory.

  5. #5
    No I have not, but I will if necessary. What would explain one cylinder being lean.

  6. #6

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    Here is some information off the “How to” section.

    http://greenhulk.net/forums/showthread.php?t=70129

    But you need to remove the tamper proof caps to install t handles.

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  8. #7
    steve45's Avatar
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    The white plug is way too lean. You MUST richen it or you'll burn up that cylinder very quickly.

    I really don't like the gray plug. That cylinder may be having a meltdown. Gray deposits often mean metal is coming off the piston. I would do a compression test before riding it again.

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  10. #8
    The middle plugs looks more gray in the picture but it is black from being too rich. I am gonna take the carbs back out and do the recipe. Anyone have the the info on the fuel to return mod?

  11. #9

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    The search feature is your friend....

    http://greenhulk.net/forums/showthread.php?t=177671

  12. #10

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    You’ll also need to perform this mod....

    http://greenhulk.net/forums/showthread.php?t=94630

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