This manual covers the WR450F and WR450FR models produced between 1998 and 2007. The WR450F represents a flagship four-stroke enduro machine, celebrated for its potent engine and capable chassis. This generation reflects a key period of evolution for the model, designed for off-road enthusiasts and competitive riders who demand reliability and performance. This comprehensive workshop service repair manual provides detailed instructions for maintenance, troubleshooting, and repair of your WR450F / WR450FR. It covers all major systems, including the engine, fuel system, ignition, transmission, brakes, suspension, and electrical components. With hundreds of illustrations, detailed substeps, and clear wiring diagrams, this manual is an indispensable resource for both do-it-yourself owners and professional technicians seeking to maintain their vehicle in optimal working condition.