Market Position:
The Suzuki KingQuad LT-A400/LT-F400 series are positioned as reliable, mid-range utility ATVs, known for their robust engineering and versatility in various terrains, catering to recreational riders and utility users alike.
Competitive Analysis:
Competes with models from Yamaha (Grizzly 400/450), Polaris (Sportsman 400/500), and Can-Am (Outlander 400/500) in the utility ATV segment. The KingQuad is often praised for its balanced performance, comfortable ride, and proven Suzuki reliability.
Key Features Of Vehicle:
Automatic transmission, selectable 2WD/4WD, independent front and rear suspension, electronic fuel injection (on some models), robust chassis, and integrated storage. The LT-A variants are typically 4x4, while the LT-F variants could be 2x4 or 4x4 depending on the specific sub-model designation (K8 vs. FK8).
Systems Covered:
Engine (including disassembly, assembly, tuning, diagnostics), Fuel System, Ignition System, Lubrication System, Cooling System, Transmission, Drivetrain (including front and rear differentials, driveshafts, axles), Suspension (front and rear), Steering System, Brake System (hydraulic and mechanical components), Electrical System (wiring diagrams, lighting, charging system, starting system), Chassis, Frame, Bodywork, Wheels, Tires, and Accessories.
Procedures Included:
Routine maintenance, scheduled servicing, detailed repair procedures, troubleshooting guides, diagnostic flowcharts, component testing, specifications, tolerances, adjustments, torque values, component removal and installation, complete engine rebuild, transmission overhaul, differential service, electrical system diagnosis, brake bleeding, suspension alignment checks, and bodywork repair.
Technical Depth:
Comprehensive, covering everything from basic fluid changes and inspections to advanced engine diagnostics, transmission rebuilding, and electrical system troubleshooting. Suitable for both amateur mechanics and professional technicians.
Engine Chapters:
Engine Overhaul, Cylinder Head, Cylinder, Piston, Crankshaft, Lubrication System, Cooling System, Fuel System, Ignition System, Emission Control System (if applicable), Engine Specifications, Troubleshooting.
Drivetrain Chapters:
Transmission, Clutch, Drive Shafts, Front and Rear Differentials, Hubs, CV Joints, Axles, Gear Ratios, Drivetrain Troubleshooting.
Chassis Chapters:
Frame, Front Suspension (A-arms, shocks, steering knuckles), Rear Suspension (Swingarm, shocks, trailing arms), Wheels, Tires, Steering System (Handlebar, tie rods, steering shaft), Brake System (Master cylinders, calipers, lines, pedals, levers).
Electrical Chapters:
Wiring Diagrams, Battery, Charging System (Stator, Regulator/Rectifier), Starting System (Starter motor, solenoid), Ignition System Components, Lighting (Headlights, taillights, brake lights), Switches, Fuses, EFI Control Unit (ECU), Troubleshooting Electrical Faults.
Body And Accessories Chapters:
Body panels, seats, fenders, racks, guards, lighting adjustments, cosmetic repairs, and accessory installation guidance.
Engine Type:
4-stroke, SOHC, 1-cylinder, liquid-cooled
Displacement:
376cc (For the LT-A400/F400 designation, this is the common displacement)
Bore X Stroke:
Specific bore and stroke values are detailed within the manual. Generally around 80.0 mm x 74.4 mm for this engine family.
Compression Ratio:
Typically around 8.7:1 for this engine.
Fuel Delivery:
Electronic Fuel Injection (EFI) is common for this generation, offering precise fuel delivery for improved performance, fuel economy, and emissions. Some earlier or base models might have used carburetors, but the 2008-2009 models generally lean towards EFI.
Ignition System:
Digital CDI with electronic ignition timing
Oil Type:
Suzuki recommends specific motorcycle or ATV engine oil meeting API SF, SG, or SH specifications with JASO MA certification. SAE 10W-40 or SAE 20W-50 are common viscosity grades depending on ambient temperature. Specific part numbers for oil filters will be in the manual.
Cooling System Type:
Liquid-cooled with a fan-assisted radiator.
Overall Length:
Approximately 2055 mm (80.9 in)
Overall Width:
Approximately 1070 mm (42.1 in)
Overall Height:
Approximately 1170 mm (46.1 in)
Curb Weight:
Around 261 kg (575 lbs) for 4x4 models, slightly less for 2x4 models. Specific weights will vary by sub-model and accessories.
Towing Capacity:
Typically rated at 650 kg (1433 lbs) for braked trailers, and 300 kg (661 lbs) for unbraked trailers.
Front Rack Capacity:
Approximately 45 kg (99 lbs)
Rear Rack Capacity:
Approximately 85 kg (187 lbs)
Safety Ratings:
ATVs are not subject to the same rigorous crash testing standards as passenger vehicles. Safety is primarily achieved through design, rider training, and adherence to recommended operating procedures, all of which are covered in the manual.
Active Safety Features:
Powerful braking system (dual front disc, single rear disc), engine braking (via CVT), selectable 4WD for improved traction, and a stable chassis design. The manual details proper brake system maintenance for optimal performance.
Passive Safety Features:
Integrated chassis structure, durable plastic body panels, and ergonomic seating position. The manual emphasizes proper use of protective gear (helmet, gloves, boots, etc.) for rider safety.
Infotainment Features:
As a utility ATV, infotainment features are minimal. Typically includes a digital instrument cluster displaying speed, odometer, trip meter, fuel level, 2WD/4WD indicator, and gear selection (if applicable).
Driver Assistance Features:
Focuses on mechanical aids like engine braking and selectable 4WD. The manual aids the rider in understanding and utilizing these features effectively for safe operation.
Connectivity Features:
None in the modern automotive sense. The manual focuses on the electrical system's functionality for power delivery to lights, ignition, and accessories.
Initial Service Interval:
Typically around 1000 km (600 miles) or 6 months for the first major service, including oil and filter change, valve clearance check, and general inspection. Refer to the manual for precise intervals.
Regular Maintenance Intervals:
Engine oil and filter changes every 3000 km (2000 miles) or 12 months, air filter cleaning/replacement every 1000 km (600 miles), spark plug inspection/replacement at specified intervals, and periodic checks of brakes, tires, suspension, and drivetrain components. Detailed schedules are in the manual.
Engine Oil Capacity:
Approximately 1.9 liters (2.0 US qt) with filter change. Specific oil grade and type are crucial and detailed in the manual.
Coolant Capacity:
Approximately 1.6 liters (1.7 US qt). Use of Suzuki's specified coolant or a compatible ethylene glycol-based coolant is recommended.
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid. Never mix different types of brake fluid. The manual will specify the exact type and procedure for bleeding.
Common Issues And Solutions:
Potential issues might include drive belt wear (typical for CVTs), occasional electrical connector corrosion in wet environments, and standard wear and tear on suspension and brake components. The manual provides comprehensive troubleshooting for all these areas.
Spark Plug Type:
NGK CR7E or equivalent. Refer to manual for precise gap specification (typically 0.7-0.8 mm).
Tire Pressures:
Recommended pressures are typically around 5.0 psi (0.34 bar) for both front and rear tires. Always consult the manual for the most accurate specification and check when tires are cold.
Valve Clearances Intake:
Typically 0.04-0.08 mm (0.002-0.003 in) when engine is cold. Precision is critical and the manual provides the exact procedure.
Valve Clearances Exhaust:
Typically 0.07-0.11 mm (0.003-0.004 in) when engine is cold. The manual provides the exact procedure.
