SBT Jetski Engines, Parts & Accessories

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  1. #1
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    Default Final Bore Size 1100 STX DI

    What would be the final overall bore diameter if using the 1mm oversized SBT kit? Couldn't seem to find this spec anywhere... Thanks!

  2. #2
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    Default Re: Final Bore Size 1100 STX DI

    80MM = standard size.
    81MM = 1MM oversized.

  3. #3
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    Default Re: Final Bore Size 1100 STX DI

    Sweet, was just making sure!! Hard to put metal back lol...

  4. #4
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    Default Re: Final Bore Size 1100 STX DI

    If you are boring and honing I would wait until you have the piston in hand.
    There are minor production variances.

  5. #5
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    Default Re: Final Bore Size 1100 STX DI

    Ok well now I'm confused... What the tolerence then for ring clearances... What's the minimum and maximum vs recommended... Lot of play there for the machinist to make up for without knowing how loose or tight it should be... Really, variances in diameter?? I get weight but diameter variances... Maybe I should look at a different piston...?

  6. #6
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    Default Re: Final Bore Size 1100 STX DI

    Does a data sheet come with these Pistons giving me this like a normal set of wisecos?

  7. #7
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    Default Re: Final Bore Size 1100 STX DI

    Yes, it does.

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