This manual covers the Grizzly 550 Fi and Grizzly 700 Fi all-terrain vehicles produced between 2009 and 2010, identified by model codes YFM5FGY, YFM5FGPY, YFM7FGY, and YFM7FGPY. These ATVs have a long-standing reputation for robust and reliable performance, with the Grizzly line being a flagship offering. These models are known for their powerful engines, advanced suspension, and off-road capability, representing a significant evolution in performance and efficiency. The Electronic Fuel Injection (Fi) system ensures optimal performance and fuel efficiency across various altitudes and temperatures, while Electric Power Steering (EPS) on select models enhances control and reduces steering effort. This comprehensive service and repair manual provides complete coverage for all major systems, including the engine, cooling system, fuel system, drivetrain, electrical system, and chassis. It details scheduled maintenance, periodic checks, adjustments, fluid changes, and step-by-step instructions for component overhaul and diagnostics. With hundreds of photos, detailed illustrations, exploded diagrams, and wiring schematics, this 448-page English manual is an invaluable resource for do-it-yourself enthusiasts and experienced mechanics. It offers an inexpensive way to maintain and repair these ATVs, saving on labor costs by providing the necessary information for accurate troubleshooting and repair.