Clutch 56 teeth burn out

Discussion in 'DIY Home Built Motorized Bicycle (non kit)' started by kksbunny, Aug 21, 2013.

  1. kksbunny

    kksbunny New Member

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    Hi guys, i have a question...

    I have a max torque clutch with 13T on it
    and i have a 56T sprocket on the back wheel.... and using a #41 chain connectiong booth
    will this burnout my clutch

    It is a Harbor freight Predator 212 cc engine on it

    Or should i make a gear reduction box?

    Thank You !!!
     
    #1 kksbunny, Aug 21, 2013
    Last edited: Aug 21, 2013
  2. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

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    Why are you starting a new thread??? your old thread
    would be better to ask this question in.

    Do you know how to use the gear ratio calculator? :)

    It ain't gonna work.
    Also did you consider how wide the 212 cc is?
    How are you going to line the chain up from the front sprocket
    on the 212 cc to the back wheel sprocket?

    What bike are you putting this on?
     
  3. kksbunny

    kksbunny New Member

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    i am sorry that i started this new threat, i forgot my old one......
    I mean i made my own gear reduction box, but i want to change the gear ration so it will be 13 to 13, and 10 to 56, will this be fine.... and its a cruise bike :)
     
  4. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

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    :) Download the calculator and play with it! :D

     
  5. kksbunny

    kksbunny New Member

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    YEah, i have it already,thank you, my question was will it burn out my clutch? :)
     
  6. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

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    What top speed did the calculator say you would be going at your 212 cc motors redilne?
     
  7. kksbunny

    kksbunny New Member

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    About 49 at 3600rmp
     
  8. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

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    That is a 5.6 to 1 overall ratio. Never gonna work.

    Shoot for at least a 10 to 1 or higher.

    The flaw with your reasoning is that you are only going to be using 3600 rpm.

    What is the idle speed rpm of a 212 cc and what is the clutch lock up rpm?

    You have to take the governor off so you will be using at least 5000 to 6000 rpm
     
  9. kksbunny

    kksbunny New Member

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    but isn't it bad, is there any othe way i that i could increase the gear ratio without getting rid of the governor?
     

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