Yamaha KODIAK ULTRAMATIC YFM400FA Owner's Manual page 302

6. Fill the final gear case with oil.
Recommended oil:
SAE 80 API "GL-4" Hypoid gear oil
Oil quantity:
Periodic oil change:
0.19 L
Total amount:
0.22 L
CAUTION:
Be sure no foreign material enters the final
gear case.
7. Install the filler bolt and tighten to the
specified torque.
Tightening torque:
Filler bolt (final gear case):
23 Nm (2.3 m·kg)
8. Check for oil leakage. If oil leakage is
found, check for the cause.
9. Install the final gear case cover.
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