This manual covers the 2001 Yamaha YZF600R, also known as the Thundercat. Introduced as a mid-size sportbike, the YZF600R bridges the gap between entry-level and supersport models, targeting riders who seek a balance of performance, comfort, and everyday usability. Renowned for its smooth power delivery, comfortable ergonomics for its class, and Yamaha's characteristic reliability, this model has been a consistent performer since its introduction in the mid-1990s. Its engineering quality is evident in its liquid-cooled, 4-stroke, DOHC, inline-four cylinder engine with a displacement of 599 cc, delivering approximately 105 horsepower.

The purpose of this comprehensive Factory Service Manual (FSM) is to provide detailed information for the service, repair, and maintenance of the 2001 Yamaha YZF600R. It covers a wide range of areas including engine mechanical and electrical systems, fuel system, transmission, suspension, brakes, and the overall electrical system. The manual includes routine maintenance procedures, troubleshooting guides for common issues, component replacement instructions, reassembly specifications, and detailed wiring diagrams. This resource is designed to empower owners, mechanics, and technicians with the knowledge required to maintain the vehicle's performance and maximize its lifespan.