Whizzer Engine Mounting

Discussion in 'Whizzer Motorized Bicycles' started by Traveler, Jun 30, 2009.

  1. Traveler

    Traveler Member

    I have an H series engine mounted on an old Columbia bike. The engine seems to be shifted too far to the left, because the pedal crank is hitting the belt guard. I am attaching two photos. I appreciate any advice. Thanks.
     

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  2. rjs5700

    rjs5700 Member

    That is a very common problem. The best solution I have found is to heat and bend the crank on both sides enough to give plenty of clearance.
     

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  3. KilroyCD

    KilroyCD Active Member

    Another option is to go with a shorter crank. I had to do that with one of my builds. The standard size is 6 1/2", but I needed a 5 1/2" to clear the bottom of the drive cover. I ordered mine through BikeWorldUSA.com.
     
    Last edited: Jul 1, 2009
  4. Whizzer crank

    You could also just buy a one piece Whizzer crank. They are wider.
     
  5. Quenton Guenther

    Quenton Guenther Motored Bikes Sponsor

    Whizzer is out of the wider one peice pedal cranks.

    I have been using a slightly shorter crank [1" shorter] and installing pedal extensions which we had made for our dealers.

    Have fun,
     
  6. Traveler

    Traveler Member

    Thanks to everyone for the advice. I will probably go with the shorter crank.
     
  7. Traveler

    Traveler Member

    Engine position vertically

    Attached is a photo of the engine mounting on my project. The rear belt is pretty tight. Does it look like the engine is mounted too high?
     

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  8. RdKryton

    RdKryton Active Member

    The engine placement looks fine but you have way too much slack in the pedal chain.

    Jim
     
  9. Traveler

    Traveler Member

    Thanks. I am aware of the slack in the chain. That is my next thing to fix.
     
  10. Quenton Guenther

    Quenton Guenther Motored Bikes Sponsor

    Hi Traveler,

    Might I suggest moving the exhaust pipe forward where it is attached to the frame. The reason I mention this is to round the pipe as it leaves the exhaust manifold to remove the stress from the junction where the pipe enters the manifold. I will enclude a photo of my 1950 Schwinn Panther with the same exhaust setup. The photo will also show you have your motor mounted correctly.

    Your Whizzer is looking good!

    Have fun,
     

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    Last edited: Aug 15, 2009
  11. Traveler

    Traveler Member

    Thanks Quenton. I'll make the adjustment to the pipe. I haven't attempted to run the engine yet, but everything is hooked up and it should run. I may have to send the cylendar to you this winter for some rework.
     
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