1990-1998 Arctic Cat Snowmobiles Repair Manual, Page 337Get this manual
DRIVE SYSTEM
Centrifugal Weight Levers As previously noted, weighted levers (7, Figure 5) in the drive pulley react to engine speed and swing outThe levers press against rollers in the spider to move the sliding half of the drive pulleyCentrifugal force causes the weights to swing out as the speed of the engine increasesMovement of the weighted levers and the sliding
Drive Pulley Spring The clutch release spring (14, Figure 5) of the drive pulley controls engagement speedIf lighter spring is installed, the belt will engage at lower engine speedIf heavier spring is installed, the engine speed (rpm) will have to be higher to overcome spring pressure and allow engagement