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Valve cover gasket hole...........

Discussion in 'XJ Technical Chat' started by Blackfnttruck, Mar 2, 2016.

  1. Blackfnttruck

    Blackfnttruck Member

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    Why do some valve cover gaskets have a large hole, see pic and some don't. Doesn't seem to be necessary on my XJ650RJ. I've seen some where the hole is filled on the gasket and not cut out.


    [​IMG]
     
    Blackfnttruck, Mar 2, 2016
    #1
  2. jayrodoh

    jayrodoh YimYam

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    It's an old speed secret. They cut out the unnecessary part of the gaskets to make the bike lighter and faster!
     
    jayrodoh, Mar 2, 2016
    #2
    Stumplifter likes this.
  3. Blackfnttruck

    Blackfnttruck Member

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    Alright....first performance mod. I'm cutting a hole in mine and shaving the whole gasket down to minimum.
     
    Blackfnttruck, Mar 2, 2016
    #3
  4. XJ550H

    XJ550H Well-Known Member Premium Member

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    So it can fit multiple bikes
     
    XJ550H, Mar 2, 2016
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    k-moe likes this.
  5. Bigshankhank

    Bigshankhank Active Member

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    Nah, lose the gasket entirely and just tighten the head bolts a little more, it'll be even lighter and if any oil leaks out, the bike will be lighter still!
     
    Bigshankhank, Mar 2, 2016
    #5
  6. Blackfnttruck

    Blackfnttruck Member

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    Gotcha, so some bikes need the hole for some reason. Mine just seems to have an empty hole, that doesn't seem to go anywhere.
    Thanks
     
    Blackfnttruck, Mar 2, 2016
    #6

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