usually most people run 30:1 or 40:1 in all racing bikes it all depends on how you ride and what kind of plug you use but i woul recomend 40:1, this is a good mixture. I have been riding and working on 4 wheelers for about 10 years now and I have a 2003 Banshee and that's what I run in it. when I was younger I had a 89 RM 80 and I ran that same mixture.
32:1
32:1 yamalube
32:1 ratio
30 liters of gas to 1 liter of oil
I would run a mix of 32:1 with 89 octane fuel.
The correct mixture is 50 percent coolant 50 percent water.
buy a Yamaha yz 125 if that's to slow for you
2002
Oil capacity for the gearbox on 2002 Yamaha YZ85 is 500cc, after overhaul 550cc according to my book.
A Yamaha ATV that small is carbureted , not fuel injected.
The 2002 model, 25 hp Mercury outboard requires a 50:1 ratio, one pint of 2 cycle oil to six gallons fuel.
2002