2006 Arctic Cat ATVs 400/400TBX/400TRV/500/500TBX/500TRV/650H1/650 V-Twin Service Manual, Page 161Get this manual

2006 Arctic Cat ATVs 400/400TBX/400TRV/500/500TBX/500TRV/650H1/650 V-Twin Service Manual, Page 161

3Apply liberal amount of oil to the crankshaft bearingUsing propane torch, heat the bearing until the oil begins to smoke;
gear, and snap ring NOTE: If heating the bearing is not possible, the crankshaft can be installed using crankshaft installer
4Rotate the crankshaft so the counterweight is toward the rear of the engineInstall the counterbalance shaft 5Keeping the
counterbalance gear timing mark aligned with the one on the crankshaft gear, install the key and the counterbalance gearMD1198