Re: Need mental and ratio help! Please!
Change the engine sprocket to 6t and the first input jackshaft sprocket to 24t. You'll arrive at a negligible fraction off of the first calculator.
You will arrive at 6.87:1 on first calculator and 6.85 on second calculator, which is WAYYY too high of a gear for 6,000rpm/7,000rpm engine range.
The last sprocket combo from crankset to rear drive sprocket is NOT a gear reduction.
For 40mph at 6,000rpm, gear ratio should be 11.6:1.
For 40mph at 7,000rpm, gear ratio should be 13.55:1.
more info later.
Last edited by 5-7HEAVEN; 12-05-2008 at 09:15 PM.