Yamaha recommeded 20/1
The correct fuel oil ratio is 50/1.
i have a 1985 Yamaha yfm 200, it is gas, no fuel/oil mix needed. just put in 93 octane. unless u have a 2 stroke then its usually a 50:1 or 40:1 mixture
24 to 1
Premix (mix oil and petrol at a certain ratio) Contact you local Yamaha dealer for the best mix.
No, Yamaha's TTR lineup is all 4 stroke motorcycles.
25 to 1
I have a 1983 IT175 Yamaha and the fuel mix is recommended by Yamaha at 28 to 32: 1 I use 30:1 ratio. Hope this helps
40;1
50:1 ratio
I would run a mix of 32:1 with 89 octane fuel.
50 to 1. Use good Oil
50:1 mix