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Thread: 750/785 pistons

  1. #1
    Canadian Beaver Inspector jkindt's Avatar
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    750/785 pistons

    Will standard 750 pistons fit a Pro 785? The bore seems the same, but is the compression height the same? Or will the piston not hit TDC at the proper place?


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    yes they will work ,they give you alittle better bottom end because there lighter . you should use 785 rings with them though

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    Moderator beerdart's Avatar
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    Not sure if the 785 rings will fit the 750? The 785 uses keystone rings and the 750 uses L-shaped rings.

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    Quote Originally Posted by beerdart View Post
    Not sure if the 785 rings will fit the 750? The 785 uses keystone rings and the 750 uses L-shaped rings.
    i tried one a few weeks ago and it fit the groove ,that much i know

  5. #5
    Moderator beerdart's Avatar
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    Quote Originally Posted by 785 lugs View Post
    i tried one a few weeks ago and it fit the groove ,that much i know
    Weird maybe I am mistaken I just checked a set of 750 rings and they are keystone as are the 785 rings. I was told that the 750 used L-shaped??

  6. #6

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    i not sure on the 750 rings but i just bought some 750 pistons and the 785 rings fit perfect to me anyway

  7. #7
    Moderator beerdart's Avatar
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    Cool cheap rings for the 785

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    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    FYI: I have a new set of Wiseco 71.50mm pistons for sale.

    They list 750 and 785 on the label.

  9. #9
    Canadian Beaver Inspector jkindt's Avatar
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    Then they must have the same distance from the pin to the top of the piston.

    Now if I could only find rods 1.5mm shorter than stock 780.....

  10. #10
    Derwood98's Avatar
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    So, the 750 pistons will work in a 785? Use the 750 rings or the 785 rings?

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