2004 Arctic Cat ATVs factory service and repair manual, Page 231Get this manual
5Keeping the counterbalance gear timing mark aligned with the the one on the crankshaft gear, install the large thrust washer, key, counterbalance gear, and second large thrust washer 3Apply liberal amount of oil to the crankshaft bearingUsing propane torch, heat the bearing until the oil begins to smoke; then slide the crankshaft assembly into place6Keeping the two holes facing up, install the shift cam and inner and outer washers
I NOTE: If heating the bearing is not possible, the crankshaft can be installed using crankshaft installer