Honda FOURTRAX RANCHER 2019 Owner's Manual page 152

Rear Final Gear Oil
5. Fill the rear final gear with the recommended oil.
125 cm
3
Make sure the oil level is at the lower edge of the oil fill inspection
hole (5).
6. Coat a new O-ring with grease and install it into the fill cap
groove and tighten it to the specified torque:
12 N·m (1.2 kgf·m , 9 lbf·ft)
7. Pour the drained oil into a suitable container and dispose of it in
an approved manner (page 210).
NOTICE
Improper disposal of drained fluids is harmful to the environment.
142 Servicing Your Honda
(4.2 US oz , 4.4 Imp oz)