The Hyosung Comet GT650S and GT650R represent a compelling option in the sportbike and naked sportbike segments, originating from South Korea. These models, introduced in the early to mid-2000s, are characterized by their liquid-cooled, 90-degree V-twin 647 cc engine, delivering approximately 75-80 HP and 60-63 Nm of torque, making them suitable for riders seeking spirited performance. Their design philosophy emphasizes a sporty aesthetic, with the GT650S offering a more upright riding position compared to the full-faired GT650R. The steel trellis frame provides rigidity, contributing to a responsive riding experience. These motorcycles compete by offering a visually appealing and capable package, often at a more accessible price point than comparable models from established Japanese manufacturers.

This comprehensive service repair workshop manual provides in-depth technical information for the Hyosung Comet GT650S and GT650R. It covers all essential aspects of maintenance, repair, and overhaul for the engine, transmission, drivetrain, chassis, suspension, braking system, and electrical system. Detailed procedures for routine maintenance tasks such as oil changes, valve adjustments, and brake fluid flushes are included, alongside diagnostic flowcharts for troubleshooting common issues. The manual also contains critical technical specifications, including torque values, fluid capacities, and engine tolerances, ensuring accurate and reliable servicing. This resource is designed to assist owners, mechanics, and technicians in maintaining the optimal performance and longevity of their Hyosung motorcycles.