Hi, the fuel mixture for a YZ85 is 40:1 and I recommend using good oil. I run Amsoil Interceptor synthetic, the bike runs great on it because it burns very clean and it keeps the inside of the motor clean
yes all Yamaha dirt bikes are fuel injected
Fuel mixture ratio for Yamaha rt100?
What's does the fuel valve do on a 49cc dirt bike
I spoke to a dirt bike mechanic who said that two and a half turns on the air/fuel ratio screw from the closed position is a good starting point for this particular bike.
its says to use 32:1 ratio, if the bike has a fresh rebuild of the cylinder and piston use 15:1
Oil fuel ratio for z 1983 Yamaha IT should be listed on the oil bottle. The most common ratio is 50:1.
32.1
Check with dealer
i use a 5 gallon jug and do a ratio of 40 to 1 its a little rich but will run good
32:1 yamalube
Most all models of Yamaha outboards can be operated on a 50:1 fuel to oil ratio.
Mixing ratio should be 50:1