Gear ratio help

Discussion in '2-Stroke Engines' started by Al.Fisherman, Sep 15, 2009.

  1. Al.Fisherman

    Al.Fisherman Active Member

    When using the gear ratio calculator.... V.1.0 by Jim Silton (for a HT 80), we put in 10 for the drive gear and 44 for the driven gear, and 20" tire, (I'm sure I need to measure the tire diameter on the wheel) size...what do you all use for the engine RPM? Thanks