This manual covers the WR250F, model variant WR250FR, produced in 2001. Known for its robust liquid-cooled, 4-stroke, DOHC, 4-valve, single-cylinder engine with a displacement of 239 cc, this off-road motorcycle is built for performance and durability. The WR250F line exemplifies this with its competitive design, featuring hydraulic disc brakes, a durable steel frame, and a wet, multiple-disc clutch. The WR250FR, often a lighter variant, is engineered for demanding trail riding and racing environments, offering a potent combination of power and agility. This comprehensive service repair manual provides factory-level detail for the WR250F (chassis code 4XF), offering extensive coverage for repair and service. It details procedures for the engine, transmission, fuel system, electrical system, suspension, brakes, cooling system, chassis, and bodywork. The manual includes step-by-step instructions for maintenance, disassembly, assembly, and repair, along with essential technical specifications, torque values, and troubleshooting guides. This resource is designed to assist professional technicians and experienced DIY enthusiasts in maintaining and repairing the vehicle effectively, ensuring optimal performance and longevity.