Welcome to the factory workshop service repair manual for the TTR225, covering model years 1999 through 2004. This dual-sport/enduro motorcycle is renowned for its reliability and user-friendly design, making it a popular choice for trail riding and recreational use. Built with a commitment to engineering excellence, the TTR225 features a robust 223cc air-cooled, four-stroke single-cylinder engine, a 6-speed transmission, and a capable suspension system designed for varied terrain. Its accessible nature appeals to both do-it-yourself enthusiasts and experienced mechanics seeking dependable performance. This comprehensive manual provides in-depth guidance for the maintenance, repair, and troubleshooting of your TTR225. It covers all essential systems, including the engine, transmission, fuel system, ignition, electrical components, suspension, brakes, and bodywork. You will find detailed procedures for routine maintenance, component disassembly and assembly, adjustments, and complete rebuilds, all supported by hundreds of illustrations and photographs. Critical safety information, including notes, cautions, and warnings, is integrated throughout the text, ensuring that all work is performed correctly and safely.