This manual provides comprehensive factory service and repair information for the TXC 449/511 models produced in 2011 and 2012. As the first generation of these competition enduro motorcycles, they represent a blend of robust engineering and performance-oriented design, characteristic of a long heritage in off-road motorcycling. These models are built for demanding off-road use, featuring powerful single-cylinder, 4-stroke engines with liquid cooling and DOHC, coupled with a 6-speed manual transmission and a hydraulically actuated wet multi-plate clutch. The chassis is constructed from durable chromoly steel, and they are equipped with hydraulic disc brakes for reliable stopping power. The purpose of this manual is to serve as an authoritative guide for owners, independent repair shops, and technicians. It covers all aspects of maintenance and repair, from routine service procedures such as fluid changes and filter replacements to complete engine and component rebuilds. Detailed instructions, accompanied by clear illustrations, diagrams, and photographs, are provided for all major systems, including the fuel, cooling, engine lubrication, drivetrain, chassis, and electrical systems. Troubleshooting guides and diagnostic procedures are also included, offering factory-level knowledge to ensure the optimal performance and longevity of your TXC 449/511.