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Thread: Cylender bore

  1. #1

    Cylender bore

    can i bore only one of three cylenders 0,20 over and leave the other 2 stock ?

    thank´s


  2. #2
    ROTAX RACING performance
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    thats no problem, the bore will be 100.25 mm overseize pistons are 100.19 mm

  3. #3
    your crazy they will be more force in the crankshaft in the bored that the other .this will fatigate the crankshaft

  4. #4
    David 1 FAST VE's Avatar
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    Quote Originally Posted by mrracing View Post
    thats no problem, the bore will be 100.25 mm overseize pistons are 100.19 mm
    Yea what do you know ??

  5. #5
    2006 Turbo RXP boBO's Avatar
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    Quote Originally Posted by 1 FAST VE View Post
    Yea what do you know ??


    LOOOOOOOOL

  6. #6
    Ride Hard! aha's Avatar
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    Malte!! Man I did not get to see you at all at the WF's!!

    I was told that you can bore just 1 and its fine. So yeah I agree with Malte.

  7. #7
    GTXX's Avatar
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    if the dish volume is adjusted so the compression is the same and the weight is within tolerance, shouldn't hurt a thing.

  8. #8
    ROTAX RACING performance
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    there is no compression change with 0.25 mm bigger pistons at all

    the weight change is only 0.24 % ca.1g (you can machine that from the piston easy)

    in a race engine, i would bore all 3 cylinders, but for a stock engine no problem at all

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