The Yamaha FZ1, produced for the 2006-2007 model years, represents a pinnacle of sport-naked and sport-tourer engineering. Available in FZ1N (Naked) and FZ1S Fazer (Semi-Fairing) variants, this motorcycle draws power from a 998 cc inline four-cylinder engine, a derivative of the renowned YZF-R1 powerplant, tuned for enhanced mid-range torque and broader usability. Its chassis, featuring an all-new aluminum frame for this generation, combined with sportbike-derived suspension and radial-mount brakes, delivers exceptional handling and stability. The FZ1 is engineered for versatility, catering to enthusiast riders seeking spirited performance, commuters desiring a practical yet potent machine, and touring riders looking for a comfortable long-distance companion. This comprehensive service repair manual is designed to provide detailed guidance for the maintenance, troubleshooting, and repair of the Yamaha FZ1 (RN19 chassis code). Covering all major systems including the engine, fuel injection, ignition, cooling, transmission, chassis, brakes, and electrical systems, this manual offers in-depth procedures for everything from routine oil changes and valve clearance checks to complete engine overhauls and component diagnostics. With detailed diagrams, torque specifications, and troubleshooting flowcharts, this resource is an indispensable tool for owners, mechanics, and technicians aiming to preserve the performance and reliability of their Yamaha FZ1.