Yamaha GRIZZLY 660 Owner's Manual page 136

Recommended oil:
SAE 80 API GL-4 Hypoid gear oil
Oil quantity:
0.25 L (0.22 Imp qt, 0.26 US qt)
CAUTION:
_
Be sure no foreign material enters the final
gear case.
_
6. Install the filler bolt and tighten it to the
specified torque.
Tightening torque:
Final gear oil filler bolt:
23 Nm (2.3 m·kgf, 16 ft·lbf)
7. Check for oil leakage. If oil leakage is
found, check for the cause.
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