Changing rear sprocket

Discussion in 'Technical & Motorcycle Services' started by Changnoi1, Dec 3, 2014.

  1. Changnoi1

    Changnoi1 Ol'Timer

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    OK I am always a bit confused so please correct me if I am wrong ...

    Changing the rear sprocket from 44 to 46 will increase the "power" (acceleration) but will decrease the top speed, right?
     
  2. Deano747

    Deano747 Ol'Timer

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    Exactly.

    If, for example, your front sprocket is a 14 tooth, then your gear ratio goes from 3.14 to 3.29 by going from a 44 tooth to a 46 tooth rear.

    Front to rear ratio is generally about 1:3, so the extra 2 teeth at the rear is not quite as dramatic as a 1 tooth reduction on the front.

    Most people go the cheap and nasty way of dropping a tooth on the front, but the decreased radius puts extra stress on the chain, and the output shaft. Downside of adding a couple of teeth to the rear is often you have to get a new chain with an extra link or 2 as you often don't have enough adjustment available.
     
  3. Wald0

    Wald0 Ol'Timer

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  4. CraigBKK

    CraigBKK Ol'Timer

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    This chart is from Protaper:

    3111224c0b8022ba11745b13a831ed0e_zpse432efa9.
     

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