This depends on the oil you're using and your jetting setup. You can run anywhere from 20:1 (20 parts gas to 1 part oil, i.e. 20 liters of gasoline, one liter oil mixed in a jug) to 50:1 and even 100:1 with some of the newer high-tech oils (Amsoil Dominator, etc). I believe the sticker on the fender of my YZ80 said 32:1. I ran a little on the rich side, closer to 30:1 or even 28:1, simply because I believe that more oil means better lubrication means longer life, and I haven't had a piston burn up on me yet with this mindset.
So, for most people, I would suggest running 30:1.
Chainsaws use a mixture of 80% petrol and 20% 2-stroke oil. You can buy it already mixed, or (more commonly) mix it yourself.
it will take any 2 stroke oil just mix it with petrol with a ratio of 25/1
hi i used to race this bike in 1980 i used to use 4 star petrol and then mix silcolene oil if i remember right it was 2 or 3 cap fulls to a gallon of petrol
125 ml off 2 stroke per 5 liter petrol
About 80% of it's oil!
80 to 1 is standard for most all trials bikes...
50:1
.80 for 1 qt.
80
500cc of oil
Yamaha recommeded 20/1
allot of money is spent on petrol each day by each person they use about $60 - $80 a day