2007 Polaris Two Stroke Snowmobile Workshop Repair manual, Page 184Get this manual
FINAL DRIVEBRAKES 8Remove output gear assembly (7) and chain (8)Mark chain direction for reference during reassemblyInspect gear teeth for damageInspect chain for worn, cracked, or broken link plates12Gear, shaft, and chain cluster assembly shown
GEAR ASSEMBLY 13Low gear output power flow9Remove shift fork shaft (9) from gear clusterInspect surface of fork for wear or bending
LOW GEAR 14High gear output power flow10Remove chain from input and reverse shaftInspect gear teeth for damageInspect chain for worn, cracked, or broken link plates11Inspect dog gears and slots in mating gears closelyRounded edges will cause gears to disengage under loadReplace both dog gear and mating gear if edge of dog and or slot is roundedInspect gears for chipped, cracked, or broken teeth