Motorcycles and dirt bikes require a JASO MA or JASO MA2 oil. The difference between these classifications lie in the oils’ frictional properties.
Most people who ask have an underlying question they really mean to ask: Can I use the same motor oil in my motorcycle, dirt bike and ATV/UTV? Sure, you can use a single oil formulation for all your toys (assuming you use the correct viscosity in each). But you shouldn’t. Kind of like you can