I Have the same bike, and i use 32:1 but that's just me. I believe it depends on what you are using it for. Im not 100% sure that that is stock.
Fuel mixture ratio for Yamaha rt100?
32 to 1 is the stock ratio. Most modern 2 stroke oils can be mixed leaner.
36 parts fuel to 1 part oil..........
I run a 50:1 ratio in mine, with slight mods.(jetted and pipes) I have a stock 01 and mix is 300ml to 10ltrs
Oil fuel ratio for z 1983 Yamaha IT should be listed on the oil bottle. The most common ratio is 50:1.
40 parts gasoline one part two cycle oil
32.1
Check with dealer
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
the oil fuel ratio is 32 to 1 you should not change ratio even if you do enginge mods keep it the same