The YZF-R1, model code 5JJ, represents the second generation of this iconic supersport motorcycle, produced for the 2002 model year. This liter-bike superbike is renowned for its advanced engineering, featuring a potent 998cc inline-four engine with five valves per cylinder, delivering approximately 150 horsepower, and an aluminum Deltabox II frame for exceptional handling. Its design philosophy emphasizes mass centralization and incorporates cutting-edge features for its era, such as advanced radial-mount front brakes and a sophisticated suspension system. Built with a rich heritage in motorsports and a commitment to performance, the YZF-R1 is engineered for thrilling riding experiences on both the street and the track. This comprehensive manual serves as an indispensable resource for the 2002 YZF-R1. It meticulously details all aspects of the motorcycle, from routine preventative maintenance and fluid specifications to in-depth repair and rebuilding procedures for every major system, including the engine, transmission, braking, suspension, and electrical components. The manual also provides essential troubleshooting guides and diagnostic information, ensuring owners and technicians can effectively maintain, service, and repair the vehicle. With its detailed explanations and clear diagrams, this manual is designed to empower users to keep their YZF-R1 in optimal condition and address any potential issues with confidence.