This comprehensive service repair manual provides detailed instructions and technical specifications for the 1998-2003 KTM 400-660 LC4 motorcycles. It encompasses a wide range of topics, including general information, engine removal and refitting procedures, individual component servicing, engine assembly, electrical systems, troubleshooting guides, technical specifications, periodic maintenance schedules, and wiring diagrams. The manual features highly detailed exploded diagrams and step-by-step instructions, making it an invaluable resource for both seasoned mechanics and DIY enthusiasts seeking to understand and maintain their KTM motorcycle. With this manual, you can gain a deeper understanding of your motorcycle and perform maintenance tasks confidently, ensuring its optimal performance and longevity.

The 1998-2003 KTM 400-660 LC4 repair manual covers a range of iconic motorcycles that revolutionized the off-road world. These models, known for their powerful single-cylinder engines and agile handling, were prized by both recreational riders and professional racers. The LC4 engine, a liquid-cooled, four-stroke unit, offered a unique blend of torque and horsepower, making these KTMs capable of tackling anything from tight single-track trails to challenging desert courses. From the 400 EXC, designed for cross-country riding, to the 660 SMC, a street-legal supermoto machine, each model within the 400-660 LC4 family catered to a specific riding style. These motorcycles were known for their rugged construction, offering durability and reliability that allowed riders to push their limits without fear of mechanical failure.

The 1998-2003 KTM 400-660 LC4 models were equipped with a wide range of features that contributed to their success. The innovative PDS (Progressive Damping System) rear suspension offered superior traction and bump absorption, while the WP upside-down forks provided precise handling and comfort. The intricate network of components within these motorcycles, from the fuel injection system to the intricate gearbox, demanded a comprehensive repair manual. This manual provides detailed information on every aspect of these machines, including engine rebuilds, electrical system troubleshooting, and suspension maintenance. Whether tackling routine repairs or tackling more complex engine work, this repair manual is an indispensable resource for any owner or mechanic seeking to keep their 1998-2003 KTM 400-660 LC4 running in peak condition.