Gear ratio help

Al.Fisherman

Active Member
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Joined
Aug 13, 2009
Messages
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Location
Calera, Alabama
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
 
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