Yamaha YFM90RY Owner's Manual page 86

Tightening torque:
Engine oil drain bolt:
8 Nm (0.8m·kgf, 5.8 ft·lbf)
7. Add the specified amount of the recommend-
ed engine oil, and then install and tighten the
engine oil filler cap.
Recommended oil:
See page 10-1.
Oil quantity:
0.8 L (0.84 US qt) (0.70 Imp.qt)
8
NOTICE
Do not mix any chemical additives. Do
not use oils with a diesel specification
of "CD" or oils of a higher quality than
specified. In addition, do not use oils
labeled "ENERGY CONSERVING II" or
higher.
Make sure that no foreign material enters
the crankcase.
8. Start the engine, and then let it idle for several
minutes while checking it for oil leakage. If oil
is leaking, immediately turn the engine off and
check for the cause.
9. Turn the engine off, wait at least ten minutes,
and then check the oil level and correct it if
necessary.
8-13