Yamaha Raptor YFM660RS 2003 Manual Del Propietário página 130

Engine oil
Make sure the engine oil is at the specified level.
Fill with oil as necessary. (See pages 8-17–8-31
for details.)
Recommended oil:
-20˚
-10˚
5W/30
Recommended engine oil classification:
API Service SE, SF, SG type or higher
5-13
20˚
30˚
40˚
10˚
10W/30
10W/40
15W/40
20W/40
20W/50
EBU13250
50˚C
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