Yamaha BRUIN 350 YFM350FAT Owner's Manual page 278

8. Add the specified amount of recommended
engine oil, and then install the engine oil filler
cap and tighten it.
Recommended engine oil:
See page 10-2.
Oil quantity:
Without oil filter cartridge replacement:
2.2 L
With oil filter cartridge replacement:
2.3 L
CAUTION:
_
G
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.
G Make sure that no foreign material enters
the crankcase.
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