To qualify as a JASO/MA oil it has to meet the requirements of at least one from a list of basic 4 stroke oil standards. If it says JASO/MA OR JASO/MA2 on the bottle, you're good to go.Ok so just to make sure. I need some type of 4 stroke motor oil for wet clutches? Or should I just get a JASO MA oil? Thanks again.
Gear oil weights depend on whether you have cold winter temp swings in the area you ride it or not. I gotta tolerate -40 F temps in the winter along with 95+ F temps in the summer, so I use 75w90 full synthetic gear oil in car & ATV diffs and sled chain cases year round. If refilling a limited slip diff, make sure the gear oil you buy is intended for use with the friction disc material in the clutches. Some of the old-school automotive limited slip gear oils can chew up paper or cork frictions over time. The brand you buy is your choice....And also what type of oil do I use for my front and rear diffs? (First 300 just trying to make sure it lasts)