Will a 24 tooth work?

Discussion in 'Motorized Bicycle General Discussion' started by Bikewithamotor, Mar 23, 2010.

  1. Bikewithamotor

    Bikewithamotor New Member

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    Hey guys, I have a 80cc and it seems like my engine is plenty powerful to pull a 24t rear sprocket which i found online. (The regular is a 44)

    Will my engine have enough power if I am on the road? Thanksxct2
     
  2. Creative Engineering

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    Probably not...but the better question is: How do you plan on attaching it to your wheel?

    Jim
     
  3. Bikewithamotor

    Bikewithamotor New Member

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    Well I am going to sub out the 44 for the 24. I'm wondering if it will work though because the shift kit that you can buy for your engine uses the 24 tooth.

    What do you think?
     
  4. Creative Engineering

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    Try stepping down to a 36T. The engine will still pull it, although you will loose some low speed performance and acceleration.

    I'm fairly certain that a 24T is too small to drill for the rag joint wheel mount. Even if you can get it to work by some other means...I can assure you that you will not like the effect of a 24T sprocket!

    The shift kit has been designed to use the smaller sprockets that are on the rear cluster of a multi-speed bike. There is a primary reduction through the jackshaft prior to the final drive.

    Jim
     
  5. Venice Motor Bikes

    Venice Motor Bikes Custom Builder / Dealer/Los Angeles

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    Here's a question... How much do you weigh??
    If your real skinny like Baird (130 lbs), you can run something small like a 30T.

    *edit* I'm over 200 lbs, & I use a 40T.
     
    #5 Venice Motor Bikes, Mar 23, 2010
    Last edited: Mar 23, 2010
  6. broHSI

    broHSI New Member

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    Bikewithamotor, what is the diameter of your 24 tooth sprocket?

    Baird is running 24" wheels which makes a difference of over 3 MPH at 7000 RPM
    and
    his motor is hotted up and much faster than stock....

    Stock motor with 26" wheels should not go lower than 35/ 36 teeth on fairly flat ground

    Go bigger if you are heavy and have a lot of hills
    Altitude will decrease your performance too

    24 tooth sprocket will give you a top speed of 55 MPH at 7000 RPM
    which your engine will never pull
     
    #6 broHSI, Mar 23, 2010
    Last edited: Mar 23, 2010
  7. Venice Motor Bikes

    Venice Motor Bikes Custom Builder / Dealer/Los Angeles

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    True dat! ;)
     
  8. RedB66

    RedB66 New Member

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    I have ran a 25T. It is too much for the motor to pull. These egines can only do so much. You wouldn't think that just a couple teeth would make so much of a difference.

    I currently run a 28T. I'm 5'9" 205lbs. and I cruise at about 35MPH on my bike. It has the usual updates... plug, wire and air filter. I don't have any hills to contend with and I'm a clutch rider (I don't pedal to take off....)

    The 35MPH is on my Worksman, my stretch is much heavier (same 28T) and although it is not broke in, I'm positive it won't do 35.

    So.... try the 24. Let us know how it works (or not) for you.

    For the "Purist" out there. These are not GPS clocked speeds... just my trusty digital speedo.
     
    #8 RedB66, Mar 23, 2010
    Last edited: Mar 23, 2010
  9. Mac

    Mac New Member

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    Just dropped in... help me with the math...

    130lb = 30 tooth with 26" wheels, (head scratching repeatedly) higher math calculating air density etc

    so with 26" @ my weight I guess I'll need a 65 tooth. Thanks guys! couldn't have done it without ya!!

    LOL Mac
     
  10. Cabinfever1977

    Cabinfever1977 New Member

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    115lbs (my small skinny but) + 44t with 26" wheels = 32mph cruising. takeoffs require no peddaling.
     
  11. stv1jzgte

    stv1jzgte New Member

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    what the....
     
  12. Nashville Kat

    Nashville Kat Active Member

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    AHA!

    Probably work well if you peddle up 15 or 20 and then take off! Be pretty fast I guess.

    But won't pull well from start or uphill- too much torque like that on the motor only breaks things quickly.
     
  13. Mac

    Mac New Member

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    STV1,
    Just goofing around. I always over think things, besides, I'm not that "Large" LOL

    Mac
     

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