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Thread: indexing plugs

  1. #1
    dhoad's Avatar
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    indexing plugs

    Its been a long winter off and I'm just getting ski reassembled. 2 Questions
    1. when indexing plugs do I line up gap area with the exhaust port?
    2. I have also heard of J gapping - can someone epand on proper method
    Are these worth steps worth the effort?

    Thanks for all the previous info on the forum!
    Doug


  2. #2
    Hydrotoys's Avatar
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    exhaust.

    Fernando did work J-gapping the plugs.

  3. #3

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    Can someone expand on this. I'm not sure I understand. Do you position the plug so that the ground electode is as close to the exaust port as possible or are you saying that it needs to be as far away from the exaust port as possible? Maybe a picture? Never did well in school unless the book was mostly pictures Always went straight for the centerfold

  4. #4
    QuickMick's Avatar
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    Have the gap facing the exhaust port.

  5. #5
    Old Ski Insanity w/rpm500's Avatar
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    I'm not sure on this one as the terms different, instead of the gap being on the face of the plug, as you see on a typical ski spark plug ,you take your electrode ground,which is the piece you normally bend to set the gap and shorten it up... you then bend the electode to gap in from the side , a J in shape (I call this a side gap'd plug).
    This setup leaves the spark unshrouded in the cylinder

    I have heard of guys taking this one step further and fileing the electrode and the ground on a 45 deg angle ,then setting the gap .. This I'm told gives the spark a more perfectly flat area to jump across.

  6. #6
    XL1200Ltd-Keith's Avatar
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    index

    Island Racing is selling Watcon index washers.

    The spark is supposed to ignite towards the exhaust port.

    This is part of a post from Riva back in 2000. Do a search in the archives, type in J gap. There is some good info there.

    http://rivaforums.com/eve/forums/a/t...4/r/4496092514
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  7. #7
    Old Ski Insanity w/rpm500's Avatar
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    thanks for the picture... that clears it up for me.
    I was wrong in my understanding of a j gap.

  8. #8

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    love it! Thanks for the invaluble info!!!!!!

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