Honda PIONEER SXS500M 2020 Owner's Manual page 123

Engine Oil & Filter
Other viscosities shown in the following chart may be used when the
average temperature in your driving area is within the indicated
range.
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.
116 Servicing Your Honda
oil code
oil classification