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Starter Ring Gear -- ISSUE

Discussion in 'Norton Motorcycles (Modern)' started by richard-7, Apr 10, 2015.

  1. 961Story


    Oct 30, 2014
    I mentioned this a long time ago, it happened to me.
    The reason the bolts come loose and shear on some bikes and not others, is due to the factory using UK built starter motors and Taiwanese ring gears that had a very slightly different contact angle. Some bikes were quiet and some very noisey.
  2. richard-7


    Feb 24, 2014
    Possibly. But from my perspective, its an engineering flaw. The shoulder bolt body doesn’t engage in both parts. One part the body the other part only the tread.

    Huge mistake that often happens with juinior designers. Guilty of it myself when I was around 21yrs old. Nortons fix was to fill it with loctite. My fix was to dowel it.
    contours likes this.