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Thread: Knucklehead crank pins

  1. #1

    Default Knucklehead crank pins

    Hi Steve Slaminko here,

    Well I'm retired again for the 3rd time so the 1938 Knuck is back in the building line-up. Upon tear down, I discovered it has the correct flywheels for 1938 but the crank pin is the later stepped type. Did the flywheels have to be modified to accept this crankpin or are the 1936 - 1939 pin #348-36 and the #348-40 stepped pin interchangeable if you use the correct rod cages and bearings?

  2. #2
    Join Date
    Aug 2004
    Beautiful Northern New Mexico


    It was a direct bolt in and a definite upgrade. Use the later cages and rollers. They are common and carry more load.
    Robbie Knight Amca #2736

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