Yamaha BIG BEAR YFM400FPP Owner's Manual page 367

Model
Noise and vibration level:
Noise level (77/311/EEC)
Vibration on seat (EN1032, ISO5008)
Vibration on handlebar (EN1032, ISO5008)
Engine oil/Transfer gear oil:
Type
Recommended engine oil classification:
YFM400FP/YFM400FW
87.1 dB (A)
2
Not exceed 0.5 m/s
2
Not exceed 2.5 m/s
-20˚ -10˚ 0˚
5W/30
10W/30
API Service SE, SF, SG type or higher
CAUTION:
Be sure to use motor oils that do not contain anti-
friction modifiers. Passenger car motor oils (often
labeled "Energy Conserving II") contain anti-fric-
tion additives which will cause clutch and/or
starter clutch slippage, resulting in reduced com-
ponent life and poor engine performance.
10-2
20˚ 30˚ 40˚ 50˚C
10˚
10W/40
15W/40
20W/40
20W/50
10