GEAR RATIO CHOICES WITH THE AVAILABLE CROWNS: 27z 25z 24z
The calculated rear-wheel-RPM – OEM @12volts: OEM ratio 21,400/(27/10)
= 21,400/2.7 > 7,926 **
Other Gear Options: @12volts
24/9 = 2.67 > 8,015 **
25/9 = 2.78 > 7,698
// not really usable at 12v
…27/9 = 3.00 > 7,134; …25/10 = 2.50 > 8,560; …24/10 = 2.40 > 8,917
@11volts OEM ratio 27/10 = 21,400(11/12)/2.7 = 19,617/2.7 > 7,265
24/10 = 2.40 = 8,174 **
25/10 = 2.50 = 7,847 **
…24/9 = 2.67 > 7,347; …25/9 = 2.78 > 7,056; …27/9 = 3.00 > 6,539
SPARES
OEM NSR 6327AL 27 tooth black crown, Aluminum shank
NSR 6324BR – bronze/brass shank
NSR 6325BR
NSR 6327BR
OEM NSR 7010-10 tooth “easy” pinion. 5.5mm OD
NSR 7009-9 9 tooth
NSR 6809-9 Lightweight
NSR 6809-10 Lightweight
"... get on your bad motor scooter and ride!"
Sammy with Montrose