Yamaha BLASTER YFS200T Owner's Manual page 270

Recommended oil:
See page 10-2.
Oil quantity:
Periodic oil change:
0.6 L
cC
8 In order to prevent clutch slippage (since
the transmission 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.
8 Make sure that no foreign material enters
the crankcase.
8-21