This manual covers the 450 SX-F, 505 SX-F, and 450 SXS-F off-road motorcycles manufactured in 2007. These high-performance machines are renowned for their powerful LC4 engine architecture, offering strong torque and reliability, and are built with a focus on competitive motocross and off-road riding. The design typically features a chromoly steel frame for a balance of rigidity and rider feel, making them a popular choice among racers and enthusiasts seeking peak performance. This comprehensive factory service repair manual provides in-depth information on engine service and repair, including detailed procedures for disassembly, reassembly, and component overhaul. It covers essential systems such as the engine mechanical components, fuel system, ignition system, and exhaust system, offering hundreds of photos and illustrations to guide users. The manual is designed to assist owners and professional mechanics in performing routine maintenance, troubleshooting issues, and ensuring the longevity and optimal performance of their off-road motorcycle.