A general question...

Discussion in 'General Questions' started by loquin, Mar 26, 2009.

  1. loquin

    loquin Active Member

    on the happy time engines, what is the shaft diameter of the engine sprocket?

  2. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

    a bit over 9/16" on a 66 cc Chinese engine
    or ~ 0.570"

    however an older bronze bushed 66 cc motor is ~ 0.580"
    and their sprockets are not interchangeable

    they also use different sized keys
    Last edited: Mar 26, 2009
  3. azbill

    azbill Active Member

    I went to measure and forbisher beat me :(
    at least I got the same thing !!! LOL:)