My first motor bike build

Discussion in 'Motorized Bicycle General Discussion' started by Flyman, Dec 11, 2014.

  1. Flyman

    Flyman New Member

    Nov 28, 2014
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    Well I,m have a blast building this first bike.I,m not a bicycle guy & have not messed
    with one since I was a kid.I bought a new bike over the net as well as a bike kit.

    Now with that said it's been a little more then bolting this thing together as I have found out.
    Mounting the engine has been the biggest deal, but not bad.I,m a retired tool & die maker
    with a small machine shop & that has helped, (wink).

    I machined new front engine mount, for the frame rail was way bigger than the engine radius.
    Also the frame rail was a different angle.The neat thing I came across was the mounting of
    the rear chain sprocket. I saw how they say to mount it & the hardest part was getting it centered.

    Well the bike I got was a fixie with a reversible wheel so you can convert to a coaster.Cool so I reversed
    the wheel & removed the fixie sprocket.But in doing so I found it to be screwed on the hub.The sprocket

    has a lip the the same thickness of the motor rear sprocket. Cool so I annealed the sprocket taking the
    hard heat treat out & machined the teeth off.Then I bored the kit sprocket center hole out to fit the lip
    on the sprocket from the bike.By doing this when you screw it back on the hub you sandwich the motor
    bike sprocket in between & it run perfectly true to the hub.You still need the rubber deals & so on to
    drive it, but it works. Fly

    Tomorrow will be the start up & I will post pic..trk
  2. silverbear

    silverbear The Boy Who Never Grew Up

    Jul 9, 2009
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    Looking forward to the photos...
  3. BobbyT

    BobbyT Member

    Mar 16, 2014
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    Glad you got it together let us know how it rides. .wee.
  4. bluegoatwoods

    bluegoatwoods New Member

    Jul 29, 2012
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    Congratulations! It sounds like an ingenious modification.

    Photos would help us see it better.

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