The 2003 640 LC4 is a versatile dual-sport motorcycle engineered for both off-road excursions and everyday street use. Building on a rich heritage in off-road racing, this fourth-generation LC4 model features a powerful liquid-cooled, four-stroke single-cylinder engine, robust chassis, and long-travel suspension, offering a potent blend of performance and rugged capability. Its design prioritizes off-road oriented ergonomics and distinctive styling, making it a compelling choice for riders seeking a capable and spirited machine.

This Owner's Manual provides comprehensive guidance on the operation, maintenance, and basic troubleshooting of your 2003 640 LC4 motorcycle. It covers essential areas including engine, fuel system, transmission, suspension, brakes, and electrical systems, detailing procedures for pre-ride inspections, starting, riding, parking, and routine maintenance tasks such as oil changes and chain adjustments. The manual also includes important safety precautions and specifications to help owners and technicians keep the vehicle in optimal condition.