The TTR125, produced in 2002, is an entry-level to intermediate off-road trail bike renowned for its user-friendly power delivery, durable construction, and ease of maintenance. Designed for beginner riders, recreational enthusiasts, and youth riders, this model offers capable off-road performance and a fun riding experience. Its strengths lie in its reliability, affordability, and the overall value it provides for those seeking an accessible trail machine. The heritage in motorcycle manufacturing further underscores the quality and engineering found in this versatile off-road motorcycle. This comprehensive Service and Parts Manual provides detailed information crucial for maintaining and repairing your TTR125. It covers an extensive range of topics including engine disassembly and assembly, transmission operation, chassis and suspension adjustments, brake system maintenance, and electrical system diagnostics. The manual includes routine maintenance procedures, troubleshooting guides, and essential technical specifications. With 578 pages of English-language content, this manual empowers owners and technicians to effectively service the vehicle, ensuring its longevity and optimal performance.