The Grizzly 550, model designation YFM550, represents a robust and capable all-terrain vehicle (ATV) produced for the 2009 and 2010 model years. Known for its single-cylinder, liquid-cooled, 535cc SOHC engine featuring Mikuni 44mm throttle body fuel injection, this ATV is engineered for reliable performance in demanding off-road conditions. Its design emphasizes durability, comfort, and exceptional handling, making it a popular choice for utility work, trail riding, and recreational adventures. Key features include the automatic transmission with engine braking, On-Command® 2WD/4WD with an electronically locking front differential, and substantial cargo capacity. This comprehensive digital workshop repair manual is designed for Grizzly 550 owners, mechanics, and technicians. It provides detailed instructions for repair, maintenance, rebuilding, refurbishing, and restoration, covering all major systems from the engine and fuel system to the drivetrain, suspension, brakes, and electrical components. The manual includes step-by-step procedures, diagnostic charts, troubleshooting guidance, and technical specifications, enabling users to effectively maintain and repair their ATV. With high-quality visuals and professional-level detail, this resource aims to facilitate efficient servicing and ensure the longevity of the vehicle.