What is the fuel oil mixture ratio for a 1986 Yamaha yz80?

If u buy an oil called "Motul"...the normal mixture is 50 or 60 to1 ratio...the leaner u run the oil the less chance a fouled plug. DO NOT TRY THIS MIXTURE WITH A CHEAP OIL...U WILL REGRET IT. Motul is very good stuff...I ran it at a 60 to 1 with 110 octane fuel in a 2000 YZ250.