This manual covers the LT-F400F King Quad, a capable mid-size utility All-Terrain Vehicle produced for the 2008, 2009, and 2010 model years. Renowned for its robust chassis, reliable 376cc single-cylinder engine, and efficient 4WD system, the King Quad is designed for outdoor enthusiasts, farmers, hunters, and recreational riders. Its key features include independent front suspension, selectable front differential lock, and ample rack capacity, making it a versatile choice for various tasks and terrains. The King Quad line is recognized for offering a strong balance of performance, durability, and value within its competitive segment. This comprehensive factory service and repair manual provides detailed information essential for the maintenance and repair of your LT-F400F King Quad. It covers all major systems, including engine mechanicals, fuel, ignition, transmission, drivetrain, suspension, braking, and electrical systems. Within its over 700 pages, you will find step-by-step procedures for routine maintenance, in-depth troubleshooting guides, complete engine and transmission overhaul instructions, and critical technical specifications and tolerances. This manual is an indispensable resource for owners and technicians seeking to ensure the optimal performance and longevity of their ATV.