Yamaha RAPTOR YFM50RV Owner's Manual page 331

MODEL
Engine oil:
Type
Recommended engine oil classification:
Quantity:
Periodic oil change
–20° –10° 0°
5W30
API Service SE, SF, SG type or higher
cC
In order to prevent clutch slippage (since the
engine oil also lubricates the clutch), 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.
0.80 L
10-2
YFM50R
10° 20° 30° 40° 50°C
10W30
10W40
15W40
20W40
20W50
10