For Stock 120 racing the following rear gears are used:
Arctic Cat 120: 45
Polaris 120: 42
Ski Doo 120: 42
Clutch drive gears can not be changed from stock.
For Stock 120 racing the following rear gears are used:
Arctic Cat 120: 45
Polaris 120: 42
Ski Doo 120: 42
Clutch drive gears can not be changed from stock.