SBT Jetski Engines, Parts & Accessories

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  1. #1
    Joined
    Feb 2004
    From
    TX
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    108

    Post

    WHAT IS THE STOCK BORE ON A 94 650 MOTOR. IM DOIN A TOP END AND THE PISTONS IN IT ARE STAMPED 77.94. THE MOTOR PLATE IS MISSING AND DONT KNOW IF THESE ARE STOCK OR OVERSIZE.

  2. #2
    Joined
    Feb 2001
    From
    Glendora, Ca.
    Posts
    5,204

    Post

    77.94 is the standard bore piston size to fit into a 78mm bore sleeve, like on the stock 657cc Sea Doo motor.
    Bill O'Neal WCM
    <a href="http://www.watercraftmagic.com" target="_blank">www.watercraftmagic.com</a>

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