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  1. #1
    PolarisNut's Avatar
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    What heads are you triple pipe guys running?

    I recently acquired a very clean 2000 GP12R, with Speedwerx triple pipes (large stinger, pump gas versions), Speedwerx heads/cover, ported cylinders, Novi 48s, Advent, etc. It has been run on straight 110 its whole life, with high compression domes. Trying to figure out what to use so I can decrease its dependency on race fuel. A light mix of 93/110 would be tolerable. I'd really like to keep the girdled head cover setup, so I guess that would mean machining the domes I have...BTW, does speedwerx or anyone else still sell the dome O rings?


  2. #2
    Moderator beerdart's Avatar
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    Hey nut I have a extra ADA head FS with extra domes and new O-Rings..


    http://www.greenhulk.net/forums/showthread.php?t=81605

  3. #3
    sleeplessnMS's Avatar
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    Add 1 or 2 layers of head gaskets

  4. #4
    PolarisNut's Avatar
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    Quote Originally Posted by sleeplessnMS View Post
    Add 1 or 2 layers of head gaskets
    Well, these heads don't use gaskets..they are O ringed. Also, just adding gaskets changes the squish clearance.

  5. #5

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    I am running Riva Pro Heads w/ 175 psi of comp. I run just what you said a mix of 93 and 110. It averages out to about 100 octane. I don't know if Riva sells these heads anymore. I will throw up a pic when I get home so you see which ones I am talking about.

  6. #6
    WE DONT DIAL 911 RDH's Avatar
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    I'm running 41cc riva girdled gasket heads, used to run miller o-ring heads but I suspected a leak.. I prefer gasket over O-ring... Only running93 octane

  7. #7

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    Heres the pic
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  8. #8
    CHICKA WAH WAH bren's Avatar
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    I have O-ring kits on back order, they were about $45.

    your domes should be 29cc, what is the code on the domes? YFTH ?

  9. #9

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    Stock head milled to 150 PSI. can't go wrong

  10. #10

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    Quote Originally Posted by YamahaPat View Post
    Stock head milled to 150 PSI. can't go wrong
    He wants to keep the girdled head though...

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