The fuel mileage or fuel efficiency of a motorcycle can vary depending on various factors, including riding conditions, riding style, maintenance, and individual variations in the motorcycle itself.
On average, riders report achieving city mileage (in urban riding conditions) of around 25-35 miles per gallon (mpg). Highway mileage (during constant-speed cruising) can range from 45-60 mpg.
It's important to note that these figures are approximate and can vary based on factors such as traffic conditions, terrain, rider weight, riding habits, and the overall condition and maintenance of the motorcycle. Additionally, these figures are based on user-reported experiences and can vary from person to person.
To get a more accurate understanding of the fuel mileage you can expect from your specific CBR 250R 20058 version, it's recommended to monitor your own fuel consumption over several refills. By recording the mileage and the amount of fuel consumed, you can calculate your bike's specific fuel efficiency and get a more accurate idea of its mileage performance.