Question for the Gear Ratio Guru's

Discussion in 'Transmission / Drivetrain' started by lowracer, Oct 19, 2008.

  1. lowracer

    lowracer Member

    I'm getting ready to put my 2nd MB together & have a gear ratio question.
    What diameter drive pulley would I need to use?
    I'm spot welding a narrow rim to my mountain bike rear wheel to run a v-belt. The actual diameter is 22" (not 26").
    I'd like to get about 40 mph using a 2hp, 2 stroke, 40cc without other transmission reduction bolt-ons.

  2. levsmith

    levsmith Member

    we need to know the rpm of the motor
  3. lowracer

    lowracer Member

    Peak horsepower is 2hp @ 6000 rpm.
    Peak torque is ? @ 5000 rpm.