Mobil 1 Racing 4T 10W40W oil Advanced full synthetic, is what I am going to use, it says on the front "Wet Clutch Primary" and on the back states "JASO MA" , I have used Mobil 1 synthetic oil since 1979, tried it first in a Toyota Truck after 14 years and 150,000 miles I decided to sell it, the valve cover was leaking some oil, so I decided to change the gasket, I was amazed when I pulled the valve cover off, no sludge or tarnish, just glistening metal, like it was new. Made a firm believer out of me.
My latest 4 wheeler is a Yamaha Grizzly 700 EPS SE. I sold my 2002 Honda Foreman to buy this Yamaha. I still have my 1999 Kawasaki Bayou 220(1st), I let that be my daughter's 4 wheeler. This Yamaha really has more power than the Honda Foreman, still breaking the Yamaha in per manual suggestions. The Mechanic at the dealership I purchased it from, said the 1st maintenance is important, he said they change spark plug, adjust valves, change oil and filter, ect... So I may let them do the 1st maintenance, then I will do the following maintenance, and after a few hours, buy a Yamaha oil filter and put in the Mobil 1 Racing 4T 10W40W oil.