- Joined
- Dec 11, 2023
- Messages
- 21
It’s basically the clutch friendly indicator of a lubricant. For motorcycles with shared sump systems (clutch is bathed in the same oil that lubes the engine), the JASO-MA2 rating more or less is the guarantee that friction modifiers won’t bed into the clutch plates and cause a loss of friction (and therefore a loss of power transfer).Don’t know… any idea which machine/test that is? We can always ask…