The recommended fuel mixture for a Yamaha DT100 motorcycle is 25:1 (gasoline to oil ratio). This means that for every 25 parts of gasoline, you should add one part of two-stroke engine oil.
For example, if you are filling your gas tank with 25 liters of gasoline, you would add 1 liter of two-stroke engine oil.
_Be sure to use a high-quality, two-stroke engine oil that is specifically formulated for motorcycles._
