This comprehensive repair manual provides detailed instructions and technical specifications for the KTM 400 and KTM 660 LC4 motorcycles, covering model years 1998 to 2003. It is designed to assist both experienced mechanics and DIY enthusiasts with a wide range of maintenance and repair tasks. The manual includes information on servicing, disassembling, and assembling the engine, as well as detailed coverage of electrical systems, fuel systems, troubleshooting, and periodic maintenance schedules. Wiring diagrams are also included for easy reference. With its extensive coverage and clear instructions, this manual is your essential resource for keeping your KTM 400 or 660 LC4 in peak condition.

The KTM 400 and 660 LC4 motorcycles, produced from 1998 to 2003, were renowned for their off-road prowess and performance. These machines, built on the legendary LC4 engine platform, offered a thrilling blend of power, agility, and durability that cemented their status as formidable competitors in the enduro and supermoto racing scenes. The KTM 400, powered by a 395cc single-cylinder engine, was a lightweight and agile machine, ideal for tight trails and technical terrain. The KTM 660, boasting a larger 654cc engine, delivered more torque and power, making it a formidable choice for high-speed runs and challenging off-road conditions. Both models featured a robust steel frame, long-travel suspension, and a responsive throttle, providing confident handling and a thrilling riding experience.

The KTM 400 and 660 LC4 motorcycles were known for their reliability and ease of maintenance. The single-cylinder engines were simple in design, making routine servicing and repairs relatively straightforward. The robust construction and durable components ensured these machines could withstand the rigors of off-road use. However, like any motorcycle, regular maintenance and proper care were essential for maintaining peak performance and ensuring a long service life. The availability of a repair manual, like the one mentioned, proved invaluable for owners who wanted to handle their own maintenance and repair tasks. This manual provided detailed instructions, diagrams, and specifications, making it an indispensable resource for keeping these machines running smoothly and reliably.