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  1. #1

    Is it bad to oversize one piston.

    Is it bad to oversize one piston. Have you done it with any noticeable problems , issues.


  2. #2
    Engine balance would be the only issue - a bigger piston will weigh more.. Has it been do before - Yes.. Would I do it- No..

  3. #3
    SURFnTURF's Avatar
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    You can run one oversize from the other with no problems.
    Squish can be different from different brands though.

  4. #4
    What would be closest to seadoo if you know

  5. #5
    SURFnTURF's Avatar
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    If your engine is stock seadoo have a good amount of squish so any brand will work.

    If it isn't stock and squish is tight already I would measure it to be sure.

  6. #6
    surferd15's Avatar
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    I wouldn't do it. I guess it depends how much bigger. What size you going to and what is the other? Engine balance would be off, and might shorten the life of your crank. Its not worth it IMO.

  7. #7
    monaroman76's Avatar
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    The Seadoo workshop manual says it is fine to do.

  8. #8

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    i wouldn't do it either..

  9. #9
    SURFnTURF's Avatar
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    Do you guys think that every piston set with the pins weigh the same in each box ?
    Try it sometime and you will be surprised.

  10. #10
    Just do it, I might not go 1mm difference but .25 or .5 should be good to go. Pulled apart plenty like that and owners didn't even notice

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