Yamaha GRIZZLY 125 YFM125GT Owner's Manual page 254

Recommended oil:
See page 10-2.
Oil quantity:
0.6 L
6. Install the oil filler bolt, and then tighten it to
the specified torque.
cC
8 Make sure that no foreign material enters
the final transmission case.
8 Make sure that no oil gets on the tires or
wheels.
8-25