Suzuki LT-A400/F, LT-F400/F KingQuad 400 Service, Inspection & Overhaul Manual - Essential ATV Repair Guide (2008-2009)

Complete Service & Overhaul Manual for 2008-2009 Suzuki KingQuad 400 (LT-A400/F, LT-F400/F)

Maintain your ATV with the same professional-grade information used by authorized Suzuki technicians. This comprehensive service manual is specifically designed for the 2008-2009 Suzuki KingQuad 400 series, covering both the automatic (LT-A400) and manual (LT-F400) transmissions, as well as the 2WD and 4WD (F-models) variants.

Whether you are performing a simple oil change or a complete engine overhaul, this guide provides the technical depth required to ensure your KingQuad remains reliable on the trail or the farm.

Expert Technical Coverage

This manual focuses on the air-cooled, SOHC, 4-stroke engine that defines the KingQuad 400's reputation for durability. It includes detailed specifications for the 376cc powerplant, including precise torque values and wear limits that are crucial for long-term engine health.

Key Service Highlights

• Engine Diagnostics & Overhaul: Comprehensive instructions for the top and bottom end, including piston, crankshaft, and valve train service.
• Transmission Systems: Specialized sections for the QuadMatic CVT (LT-A400) and the 5-speed manual transmission with sub-transmission (LT-F400).
• Fuel & Lubrication: Detailed data on the 87+ octane fuel requirements and the specific 10W-40 API SF/SG or SH/SJ oil capacities (3,000 ml for standard changes; 3,500 ml for full overhauls).
• Drivetrain Maintenance: Step-by-step procedures for the front differential and final gear cases, including Hypoid gear oil SAE #90 GL-5 specifications.
• Electrical & Wiring: Full schematics and troubleshooting for the ignition system, charging circuit, and electronic sensors.

Vehicle Identification & Specifications

To ensure you are using the correct data for your specific machine, this manual references the following Serial Number ranges and technical identifiers:

• LT-A400/F (Automatic): Covered for the K8 (2008) and K9 (2009) model years.
• LT-F400/F (Manual): Covered for the K8 (2008) and K9 (2009) model years.
• Frame/VIN Reference: Look for prefixes starting with 5SA (Check your vehicle's steering head or frame rail for verification).

Detailed Maintenance Data

• Fuel Tank Capacity: 16.0 L (4.2 US gal) including a 2.9 L reserve.
• Tire Pressure Specs: Optimized settings for various terrains to ensure stability and traction.
• Torque Specs: Critical bolt patterns for the cylinder head, crankcase, and suspension components to prevent mechanical failure.

Why This Manual is Essential

This is not a generic "how-to" book. It is a model-specific document that includes high-resolution illustrations showing the basic principles of operation and exact work procedures. By following the factory-recommended maintenance schedules and lubrication points, you protect your investment and ensure the safety of the rider. From the front drive differential (300 ml capacity) to the complex electrical system, every inch of your Suzuki KingQuad 400 is documented here.