The gas oil mixture for that sled is 24:1 according to the tag on my 79 srx.
i run 40-1 in mine but thinking of 50-1 spark plugs were a bit dark
what is the oil gas mixture for a ysr50
fuel line routing on 1979 Yamaha xs1100
50:1 That is what I run in my 1982 440 ss
50:1
20:1
32:1 gas to oil mixture
In most cases you should not mix oil into the gas of your 1979 Yamaha 50 cc moped. This type of moped had its own oil reservoir. If it is not marked on the gas You do not need to oil with the gas.
The fuel mixture for a Yamaha 40 hp 2 stroke outboard engine is 50:1, gas, oil mixture. You should use new gas when you get the engine ready for the season.
the mixture is 50:1 I would use synthetic oil
the safest mixture would be 32 to 1
40 to 50:1 with Yamalube