The fuel efficiency or average mileage of a motorcycle can vary depending on several factors, including the specific model, engine size, riding conditions, riding style, and maintenance. Without specific details about the particular Royal Enfield Bullet model you're referring to, it's challenging to provide an accurate estimate.
Motorcycles typically achieve better mileage when ridden at moderate speeds within their optimal efficiency range.
If you frequently ride a Royal Enfield Bullet at speeds of 100 mph (160 km/h) or higher, it's likely that the fuel efficiency will be significantly reduced compared to lower speeds. Riding at higher speeds increases wind resistance and puts more strain on the engine, resulting in increased fuel consumption.
To get a more accurate estimate of the average fuel efficiency for your specific Royal Enfield Bullet model at higher speeds, it's recommended to consult the motorcycle's manual or refer to real-world experiences shared by other Bullet owners who have ridden at similar speeds.