Honda CRF250F Owner's Manual Installation And Operation page 182

JASO T 903 standard
The JASO T 903 standard is an index for
engine oils for 4-stroke motorcycle engines.
There are two classes: MA and MB.
Oil conforming to the standard is labeled on
the oil container. For example, the following
label shows the MA classification.
(1) Oil code
(2) Oil classification
(1)
(2)
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