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Registered
Join Date: May 2004
Location: Lake Cle Elum - Eastern WA.
Posts: 8,417
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Years ago, when I was road racing, I wrote a computer program in BASIC that allowed you to put in sprocket size, tire size, etc and get the rpm vs speed.
But from experience, just up one tooth on the countershaft sprocket, or 3 teeth smaller on the rear.......That will lower your rpm by up to 500 at 65 mph....If you make more drastic changes, you won't have the torque to overcome the wind resistance and be shifting down all the time. Shifting down defeats your purpose...G'luck
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Bob S.
73.5 911T
1969 911T Coo' pay (one owner)
1960 Mercedes 190SL
1962 XKE Roadster (sold) - 13 motorcycles
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