1990-1998 Arctic Cat Snowmobiles Repair Manual, Page 338Get this manual
328 half of the pulley is opposed by the pressure of the springUntil engine speed reaches the engagement rpm, the weights have not yet moved the sliding half of the pulley enough to engage the beltThe force exerted by the weighted levers is controlled by engine rpmThe faster the crankshaft rotates, the farther the weights pivot outMovement of the sliding half of the drive pulley is controlled by the shape of the weight rampsSecondary Spring
CHAPTER THIRTEEN