Yes, Royal Enfield bikes have fuel tanks. Like most motorcycles, Royal Enfield models are equipped with fuel tanks that store the fuel required to power the bike's engine. The fuel tank is typically located in the central portion of the motorcycle, between the rider's seat and the handlebars. The capacity of the fuel tank varies depending on the specific model and can range from around 11 liters to 20 liters or more, depending on the variant and design.