Factory recommended 30:1 for normal oils,
otherwise follow the oil maker's recommendations.
40 to 50:1 with Yamalube
The gas tank on a 1999 Yamaha YZ 250 has a 3-gallon capacity. The YZ250 has a 244 cc liquid-cooled two-stroke reed-valved engine.
what is the oil gas mixture for a ysr50
i run 40-1 in mine but thinking of 50-1 spark plugs were a bit dark
20:1
50:1
32:1 gas to oil mixture
The oil-to-gas ratio for a Yamaha 250 outboard motor typically requires a mixture of 50:1, meaning 50 parts gasoline to 1 part two-stroke oil. This equates to 2.6 ounces of oil per gallon of gasoline. Always refer to the owner's manual for the specific model, as recommendations may vary slightly.
The gas oil mixture for that sled is 24:1 according to the tag on my 79 srx.
what means 20-1 gas mixture for 1984 Honda motorcycle atc 250 r
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