Model:
King Quad 400 AS/FS
Model Codes:
LT-A400, LT-F400, LT-A400F, LT-F400F
Model Years Covered Primary:
2008, 2009, 2010
Model Years Covered Secondary:
2011, 2012 (ASi/FSi variants if similar)
Market Position:
The Suzuki King Quad 400 AS/FS is positioned as a capable mid-size utility ATV, offering a blend of performance and versatility for recreational and light work applications. It competes with models from Yamaha (Grizzly 400), Polaris (Sportsman 400), and Can-Am (Outlander 400).
Key Features Vehicle:
Selectable 2WD/4WD, Automatic transmission (CVT), Independent front suspension, Swingarm rear suspension, Shaft drive, Electronic fuel injection (on some models), Compact and powerful engine.
Manual Value Proposition:
Provides dealership-level repair and maintenance information, enabling owners to perform a wide range of service tasks, saving time and money compared to professional servicing. Instant download offers immediate access to critical repair data.
Systems Covered:
Engine, General Information, Transmission (Manual & Automatic), Chassis, Lighting, Steering, Seats System, Clutch, Suspension, Locks, Brakes, Lubrication, Electrical, Frame, Fuel System, Battery, Cooling System, Exhaust System, Drivetrain (ATV Specific)
Procedures Included:
Routine maintenance, troubleshooting, diagnostics, repair procedures, component disassembly and reassembly, electrical system diagrams, torque specifications, fluid capacities, component testing, adjustments
Technical Depth:
Comprehensive (from basic maintenance to complete engine and transmission rebuilds, in-depth electrical diagnostics)
Engine Type:
4-stroke, Single-cylinder, SOHC, 4-valve
Bore X Stroke:
83.0 mm x 70.0 mm
Cooling System:
Liquid-cooled
Fuel System:
Mikuni BSR33 Carburetor (for 2008-2009 models) or Fuel Injection (EFI) (for 2010+ models, depending on ASi/FSi designation and specific market)
Compression Ratio:
9.3 : 1
Ignition:
Electronic ignition (CDI)
Lubrication:
Forced lubrication (wet sump)
Engine Oil Type:
Suzuki recommends SAE 10W-40 API SG or SH, or SAE 5W-30 API SG or SH for colder temperatures.
Engine Oil Capacity:
Approx. 2.4 L (2.5 US qt) without filter change, 2.5 L (2.6 US qt) with filter change.
Transmission Type:
Automatic (CVT - Continuously Variable Transmission)
Drive System:
Shaft drive, Selectable 2WD/4WD
Gear Reduction Ratios:
The manual will detail specific gear reduction ratios for high and low range and reverse.
Transmission Fluid Type:
Suzuki recommends Suzuki GEAR OIL (part number 99000-25040-002 or equivalent) or SAE 80 API GL-5 gear oil for the final drive and differential. The CVT transmission uses its own internal lubrication. The manual specifies exact fluid types and capacities.
Overall Length:
Approx. 76.8 inches (1950 mm)
Overall Width:
Approx. 41.3 inches (1050 mm)
Overall Height:
Approx. 43.7 inches (1110 mm)
Wheelbase:
Approx. 48.4 inches (1230 mm)
Ground Clearance:
Approx. 7.3 inches (185 mm)
Dry Weight:
Approx. 571 lbs (259 kg) for FS/F models, 575 lbs (261 kg) for AS/A models
Towing Capacity:
661 lbs (300 kg)
Rack Capacity Front:
88 lbs (40 kg)
Rack Capacity Rear:
176 lbs (80 kg)
Active Safety Features:
Powerful engine braking (via CVT), selectable 4WD for enhanced traction, responsive braking system.
Passive Safety Features:
Durable frame construction, integrated handlebar guards, comfortable seating position for control.
Braking System:
Front: Dual hydraulic disc brakes, Rear: Single hydraulic disc brake. The manual provides detailed procedures for brake pad replacement, caliper service, hydraulic system bleeding, and brake fluid specifications.
Infotainment Features:
Basic; focused on functionality over entertainment. Includes handlebar-mounted multi-function display showing odometer, trip meter, speedometer, 2WD/4WD indicator, fuel gauge (on FI models), and neutral/reverse indicators.
Driver Assistance Features:
Selectable 4WD system enhances off-road capability and rider control. Engine braking provided by the CVT system aids in downhill descents.
Lighting System:
Dual halogen headlights, LED taillight/brake light. Manual covers bulb replacement, aiming, and electrical circuit troubleshooting for the lighting system.
Service Intervals Engine Oil
Engine Oil And Filter Change:
Refer to manual for specific intervals, typically every 6 months or 1,000 miles (1,600 km) or 100 operating hours, whichever comes first. Check oil level more frequently.
Service Intervals Air Filter
Air Filter Cleaning Replacement:
Inspect and clean air filter every 6 months or 500 miles (800 km) or 50 operating hours. Replace as needed. Crucial for engine longevity, especially in dusty conditions.
Service Intervals Spark Plug
Spark Plug Inspection Replacement:
Inspect and clean/gap spark plug every 6 months or 500 miles (800 km) or 50 operating hours. Replace as needed. Specific spark plug part number (e.g., NGK CR7E) will be detailed in the manual.
Service Intervals Valve Clearance
Valve Clearance Adjustment:
Typically recommended at first major service or every 12 months/1,000 miles, but refer to manual for exact intervals. Proper valve clearance is critical for engine performance and preventing damage.
Service Intervals Brake Fluid
Brake Fluid Flush Replacement:
Recommended every 12 months or 1,000 miles (1,600 km) to ensure optimal braking performance and prevent corrosion. Use DOT 4 brake fluid.
Fluid Specifications Coolant
Coolant Type:
Suzuki recommends a 50/50 mixture of antifreeze and distilled water. Use a high-quality, ethylene glycol-based antifreeze suitable for aluminum engines.
Common Issues Potential:
Some users report occasional issues with CVT belt wear if subjected to excessive stress or improper engagement. Carburetor models might require more frequent cleaning. Electrical connectors can be susceptible to corrosion if not protected. The manual provides troubleshooting for all these areas.
Torque Specifications Critical
Torque Specifications Engine Mounts:
The manual will provide precise torque values for critical fasteners like engine mounts, cylinder head bolts, and wheel nuts, essential for safe and reliable operation.
Brand Heritage:
Suzuki has a long-standing reputation in the powersports industry, known for producing reliable and capable motorcycles and ATVs. The King Quad lineage is a testament to their expertise in building durable, off-road vehicles.
Model Evolution:
The King Quad 400 series represents an evolution of Suzuki's mid-size ATV offerings, building upon previous generations. The 2008-2010 models introduced updates and refinements, with potential for further enhancements in later years as indicated by the ASi/FSi variants.
Production Context:
Produced during a period when ATVs were increasingly popular for both utility and recreation. The King Quad 400 was designed to offer a balance of power, comfort, and maneuverability for a wide range of riders.
