This comprehensive KTM 640 LC4 Adventure-R Duke Service and Repair Manual covers models from 1998 to 2003, offering detailed instructions and technical specifications for maintenance and repair. It provides step-by-step guidance accompanied by clear diagrams and illustrations to simplify complex procedures. The manual equips you with the knowledge to handle a wide array of tasks, from routine maintenance like oil changes and filter replacements to more advanced repairs involving engine components, fuel systems, electrical systems, and more. You'll find detailed information on: * General information about the KTM 640 LC4 Adventure-R Duke * Routine maintenance procedures and schedules * Technical specifications for all major components * Periodic checks and adjustments required for optimal performance * Lubrication procedures and recommended fluids * Comprehensive coverage of the cooling system, including troubleshooting tips * Detailed instructions for transmission service and repair * Guidance on drive chain maintenance and replacement * In-depth analysis of engine specifications and troubleshooting * Engine removal and installation procedures * A thorough breakdown of the fuel system * Steering system operation, maintenance, and adjustment * Shocks and suspension component repair * Bodywork repair and replacement * Intake and exhaust system components * Electrical system troubleshooting and repair * Advanced troubleshooting techniques * Wiring diagrams for easy identification and repair This manual is designed to be user-friendly, enabling individuals with basic mechanical knowledge to service and repair their KTM 640 LC4 Adventure-R Duke with confidence. Its comprehensive nature and detailed instructions make it an invaluable resource for both DIY enthusiasts and professional mechanics.

The KTM 640 LC4 Adventure-R Duke, produced from 1998 to 2003, was a pioneering motorcycle that combined the ruggedness of an off-road machine with the versatility of a capable street bike. Powered by a single-cylinder, 640cc, liquid-cooled, four-stroke engine, the Adventure-R Duke generated a healthy dose of power and torque, making it a formidable force both on and off the beaten path. This engine, renowned for its reliability and durability, was paired with a robust 5-speed transmission, allowing riders to conquer challenging terrain and enjoy spirited riding on paved roads. The Adventure-R Duke featured a strong, tubular steel frame with a long-travel suspension setup, consisting of a 48mm upside-down fork and a monoshock rear, designed to tackle rough terrain with ease. A high ground clearance, standard skid plate, and spoked wheels with knobby tires further emphasized the bike's off-road capabilities. However, the Adventure-R Duke wasn't just an off-road machine. It also boasted a comfortable riding position, a well-designed cockpit with clear instrumentation, and a 17-liter fuel tank, making it suitable for long-distance touring. The bike's versatility, combined with its rugged construction and strong engine, made it a popular choice for adventure riders, who sought a machine that could handle the rigors of both on-road and off-road travel. The KTM 640 LC4 Adventure-R Duke, with its legendary reliability and impressive performance, became an iconic model in KTM's history, inspiring a generation of adventure bikes and solidifying the Austrian brand's reputation for building capable and exciting motorcycles.