Friction mounts

Discussion in 'Motorized Bicycle General Discussion' started by gphil, Jul 23, 2015.

  1. gphil

    gphil Member

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    My son has several good small engines 25cc's whatever. Wants to make a friction drive . I have no knowledge of these. I would guess the roller has to be a certain size for the engine etc. Anyway where to start looking for the engine mounts? As mentioned earlier, he has the engines and I said would try to steer him in the correct direction on getting a mount and here guessing rear drive. Thanks and hopefully you can point to a jobber who handles these. gphil. cvlt1
     
  2. Agreen

    Agreen Member

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    I made a friction drive 25cc weedeater once. Not the most thrilling ride, but enough for a few kicks. I forget how it mounted, but i made a sort of scissor pivot for the motor. There was a lever on the side, like a suicide clutch for engaging/disengaging the drive roller from the wheel. The roller was just a plain 7/8" socket attached to the flywheel.

    It didn't last long. The amount of pressure required to keep the socket from free spinning was a lot, which fatigued the crankshaft and eventually broke it. It was awesome. Parts went everywhere. The flywheel came off and whizzed down the street in front of me.
     
  3. Trey

    Trey $50 Cruiser

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  4. curtisfox

    curtisfox Well-Known Member

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  5. Trey

    Trey $50 Cruiser

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    Well damn... there is a friction drive section. I thought I looked.
    Thanks Curt!
     
  6. curtisfox

    curtisfox Well-Known Member

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    What is Kool is cannenball has built a new one using a three speed hub as a drive roller,and Silverbear has fallowed and built his version................Curt
     

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