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engine noise

  1. Engine noise when pulling under load

    GL1800 Tech Board
    I have a 2002 1800. When pulling my Bunkhouse it sounds like detonation (or rocks rolling around in the engine) when I roll on the throttle at RPM's above 2000 in any gear. It does not do it at lower rpm's (where one would expect detonation)nor when I am just riding the bike without trailer...
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