This manual covers the KTM 525 SX Racing, a high-performance four-stroke, single-cylinder competition motorcycle produced in 2003. Renowned for its European engineering, aggressive performance tuning, and WP suspension, the 525 SX is designed for motocross and off-road racing. Its powerful 525cc engine, combined with a robust chassis and advanced suspension components, positions it as a formidable machine in its segment, often competing against other leading motocross bikes of its era. The model's lineage is rooted in KTM's strong off-road heritage, with continuous refinement aimed at delivering championship-winning performance.

This Factory Service Repair Manual provides comprehensive guidance for the repair, maintenance, and adjustment of the KTM 525 SX Racing (2003). It details procedures for engine, transmission, chassis, suspension, brakes, electrical, and fuel systems, including disassembly, assembly, diagnostics, and troubleshooting. The manual is intended to assist owners, mechanics, and technicians in maintaining the vehicle's optimal performance and longevity, covering everything from routine service intervals to complete component overhauls. With its detailed instructions and technical specifications, this manual serves as an essential resource for ensuring the reliability and efficiency of the 525 SX Racing.