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Thread: J gap

  1. #1
    cheatin' piston popper addicted's Avatar
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    J gap

    anyone J gap their plugs? seems the GPR's can do it once they change there coils. Can the "old school" ignitions fire them on the stock coils?


  2. #2
    Old Ski Insanity w/rpm500's Avatar
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    yes.. most claim some gains, 50 rpm's I think is about the most I've read..
    Last edited by w/rpm500; 05-31-2007 at 09:52 AM.

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    r33pwrd's Avatar
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    Do you need to change your coils on the gpr's?

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    Moderator RX951's Avatar
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    Side gapping / J-gapping will work fine on all of them. No need to change out coils

    Mine idles smoother after I did this, that was the first thing I noticed on my TACH

  5. #5
    cheatin' piston popper addicted's Avatar
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    What kind of gap would you guys suggest for our older ski's? Is indexing still a good idea with J gaps?

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    Moderator RX951's Avatar
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    http://www.greenhulk.net/forums/show...ht=spark+plugs

    I set my gap at the recommended gap setting, then I made the side cut.

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    Question reply to last posting

    This is a new idea for me to try. I'm in the mix of doing a lot of things to my craft right now. How would you go about indexing the spark plugs? That has to do with the gap of the sparking electrode right. Like the last person said, what kind of a gap are we talking about for the GPR's??

  8. #8
    My son (mohawk man) jeffsntx's Avatar
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    GPR plug gap should be around .090 for maximum performance.

  9. #9
    Happily Self-Employed WFO's Avatar
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    Quote Originally Posted by jeffsntx View Post
    GPR plug gap should be around .090 for maximum performance.
    ROFLMFAO !!!!!

  10. #10
    My son (mohawk man) jeffsntx's Avatar
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    Quote Originally Posted by GP1300R powerhouse View Post
    This is a new idea for me to try. I'm in the mix of doing a lot of things to my craft right now. How would you go about indexing the spark plugs? That has to do with the gap of the sparking electrode right. Like the last person said, what kind of a gap are we talking about for the GPR's??

    I also forgot to add, if you change the plug wires to solid core instead of suppression core it is even better.

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