Use 40:1 and run a BR9EG spark plug.
the safest mixture would be 32 to 1
.55 liters
30 liters of gas to 1 liter of oil
drain it and see if there is half a litre there.
32:1 ratio
Oil capacity for the gearbox on 2002 Yamaha YZ85 is 500cc, after overhaul 550cc according to my book.
use decent two-stroke oil, check the container, but 50 to 1 is good
The Gas/Oil ratio is 50:1
jonsered oil/gas mixture ratio is 50 to 1.
it is gas only no oil is added to the gas
50:1 Oil to gas ratio
What is proper oil to gas ratio for a 1998 50hp Evenrude outboard