1971-1973 Arctic Cat Snowmobiles Factory Service Manual, Page 163Get this manual
SUSPENSION 3Tip the machine on its PTO side and secure that side of the front axle with lock washer and boltNOTE: Thread the bolt halfway into the axle shaftDO NOT TIGHTEN! Secure the rear skid frame axle with lock washer and boltNOTE: Thread the bolt halfway into the axle shaftDO NOT TIGHTEN! Tip the machine back on the recoil side and secure the rear axle with lock washer and boltNOTE: Tighten bolt securelyPosition the machine right side up and tighten the remaining front and rear axle bolts
Suspension Adjustment
A soft or firm ride can be obtained by adjusting the two (2) bolts located on each side of the suspension frameThe rear adjustment should be made for the weight of the operator to prevent "bottoming" on all but the most severe bumpsThe front adjustment should be made for snow conditions in your area57