This manual covers the 2003 KTM 125 SXS, a specialized motocross performance machine built for competitive racing. Known for its potent 124.75 cc two-stroke engine and agile handling, the 125 SXS is a derivative of KTM's established 125 SX line, engineered for enhanced performance. The Austrian-manufactured model features a liquid-cooled engine, a 6-speed transmission, and a hydraulically operated clutch, all designed to deliver peak power output characteristic of professional motocross racing. Its robust chromoly steel frame and advanced suspension components are optimized for the demands of off-road competition, reflecting KTM's strong heritage in this arena.

This Service Repair Manual provides comprehensive technical information essential for the maintenance, repair, and optimal performance of your 2003 KTM 125 SXS. It details critical procedures for engine mechanicals, lubrication, cooling, fuel, and ignition systems, as well as transmission and clutch service. Included are in-depth troubleshooting guides, routine maintenance schedules, engine rebuild instructions, and specific guidance on carburetor adjustment and clutch service. The manual is designed to assist owners, mechanics, and technicians in diagnosing issues, performing necessary repairs, and ensuring the longevity and competitive edge of this high-performance motocross bike.