He chose shaft drive because even though the power loss was 12% it was constant and reliable. According to his documented calculations a chain in perfect condition & adjustment looses just on 8% but goes up to 20% when worked hard & therefore loose. A worn one would probably consume more power. So he argues that the shaft was the better solution in the long run. As for belt drive... have you heard the tales of woe from Harley owners with rock chip holes in their belts, get one on the edge and it's goodbye 400 smackers! And that's progress???Originally Posted by FROSTY
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