Hey – I hate to drop this on you guys but here’s some calcs that defy the recent idea of using the 22k/21.5k motors (at 11v). Since we are using S/W gears our options are limited.
Also – I did the numbers using 12v and 11v and not surprisingly, 11v favors the 25k motor and 12v favors the 22k/21,5 motor.
11 VOLTS
25,000 motor rated, * 11/12v = 22,800 effective
Rear wheel RPM Ratio Spur/pinion
8085 2.82 31/11
8056 2.83 34/12
7835 2.91 32/11 OEM/Stock
22/21.5 rated, avg of 21,750 * 11/12v = 19,938 effective
Rear wheel RPM Ratio Spur/pinion
8100 2.46 32/13
7975 2.50 30/12
7728 2.58 31/12
12 VOLTS
25,000 motor rated
Rear wheel RPM Ratio Spur/pinion
8091 3.09 34/11
22/21.5 rated, avg of 21,750
Rear wheel RPM Ratio Spur/pinion
8146 2.67 32/12
7967 2.73 30/11
7713 2.82 31/11
So – at this point I am thinking we should stick with 11 volts since if most people have stuck with the stock motor there are less gear combinations they have to experiment with.
IDEAS?
"... get on your bad motor scooter and ride!"
Sammy with Montrose