The gas mileage, or fuel efficiency, of a 110cc dirt bike can vary depending on several factors such as riding conditions, riding style, terrain, and the specific model of the dirt bike. However, as a general estimate, a 110cc dirt bike typically achieves around 50-70 miles per gallon (21-30 kilometers per liter) of gasoline.
It's important to note that this estimate can vary significantly based on the factors mentioned above. Aggressive riding, continuous high speeds, and challenging terrains can all reduce the fuel efficiency of a dirt bike. Additionally, factors like maintenance, tire pressure, and the weight of the rider can also impact fuel consumption.