knuckle head gueston

Discussion in 'General Engine Discussion' started by rodue, Nov 25, 2018.

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  1. Nov 25, 2018 #1

    rodue

    rodue

    rodue

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    On the crank shaft gear, on the gear box side it shows to reduce to 5/16, the small gear is reamed to match leaving very small edge distance I was thinking on cutting the crankshaft to 1/4 D. ,or is it best to go a head and ream the gear.
     
  2. Nov 25, 2018 #2

    mayhugh1

    mayhugh1

    mayhugh1

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    I was concerned about the same thing. So, I combined the two short crankshaft gears into one single longer (steel) gear and then secured it to the crankshaft with a pair of pins carefully drilled through pairs of opposing teeth. If you are going to try to use an electric start, the stock thin brass hub might be a problem, but then turning down the crankshaft isn't too appealing either especially if you've already turned it. It's a pretty long run to the cover bearing and a skinnier crankshaft is more likely to take on run out along the way.

    You should start a build thread. I'm impressed with your cast cases and would like to follow your progress. It will also be easier for others to answer questions if you have pictures of what you're asking about. - Terry
     

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