This manual covers the 2008 TE 250, TE 450, TE 510, TC 250, TC 450, TC 510, TXC 250, TXC 450, TXC 510, SMR 450, SMR 510, and SMR450 R models. These high-performance motorcycles are renowned for their Italian engineering, powerful four-stroke engines, and success in off-road racing. With distinct Italian styling and a strong heritage, models from this era are built for demanding enduro, motocross, and supermoto applications. They feature robust perimeter steel frames, advanced USD front forks, and hydraulic disc brakes, offering riders exceptional performance and control. This workshop service repair manual provides comprehensive guidance for the maintenance, repair, and troubleshooting of your 2008 motorcycle. It details procedures for all major systems, including the engine, transmission, electrical system, chassis, suspension, and brakes. You will find step-by-step instructions for routine maintenance, engine overhauls, suspension servicing, and electrical diagnostics, complete with essential torque specifications and fluid recommendations. This manual is an indispensable resource for owners and technicians seeking to ensure the optimal performance, reliability, and longevity of these specialized machines.