The Suzuki KingQuad LT-A400F and LT-F400F models, produced for the 2008 and 2009 model years, represent a robust line of all-terrain vehicles engineered for both utility and recreational endeavors. These ATVs are recognized for their reliable performance, featuring a 4-stroke, SOHC, liquid-cooled engine with a displacement of approximately 376cc, typically delivering around 25-30 horsepower. Key features include a selectable 2WD/4WD system with a limited-slip front differential, automatic transmission with high/low range, and hydraulic disc brakes. With a substantial towing capacity and durable racks, the KingQuad is designed to handle demanding tasks and varied terrain, embodying Suzuki's commitment to quality and capability in the ATV market. This comprehensive Workshop Service Repair Manual provides complete service and repair information for all styles of the 2008-2009 Suzuki KingQuad LT-A400F/LT-F400F. It covers all major components and systems, including detailed procedures for engine overhaul, transmission, brakes, electrical systems, suspension, steering, body, and emission control. The manual includes scheduled maintenance, troubleshooting guides, diagnostic procedures, and step-by-step repair instructions, supported by hundreds of illustrations and detailed wiring diagrams. Designed for both DIY owners and professional technicians, this factory service manual offers the detail needed to maintain, troubleshoot, and repair the KingQuad effectively, ensuring optimal performance and longevity.