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  1. #1
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    27,787

    Default BMH on motor cycle engine.

    Spotted on a Ducati 750 motor cycle at recent national historic motorcycle racing meet.

    Unfortunately this bike had come off the track and sucked up a whole heap of dirt.

    Screen Shot 2019-10-04 at 5.13.23 pm.jpg

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  3. #2
    Join Date
    Jun 2005
    Location
    Helensburgh
    Posts
    7,696

    Default

    Pretty normal on non filtered Atmospheric engines and has been as long as I have been involved in racing and modifying motors and that's a damned long time. I posted an article on here years ago from IIRC Race Car Engineering magazine explaining some of the physics.
    CHRIS

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