The 450 SX-F and 505 SX-F, produced in 2007, are high-performance motocross competition off-road motorcycles designed for demanding racing environments. As part of the esteemed SX-F line, these models embody a strong heritage in off-road racing, offering potent engines and competitive chassis. They are engineered for riders seeking peak performance and reliability on the track, directly competing with other leading motocross machines of their era. This generation of SX-F motorcycles represents a significant evolution, focusing on delivering power and handling crucial for competitive motocross. This comprehensive workshop repair service manual provides detailed information for all models, engines, and trim types of the 450 SX-F and 505 SX-F from 2007. It covers essential areas including engine systems, chassis components, and the electrical system, offering professional-level diagnostics, maintenance procedures, and repair instructions. The manual is designed to empower owners and technicians with the knowledge required for scheduled maintenance, fluid changes, troubleshooting, and component repair, ensuring the optimal performance and longevity of these competition motorcycles.