Market Segment:
Mid-size utility ATV, popular for recreational riding, light-to-medium duty farm work, and trail riding.
Key Competitors:
Honda FourTrax 400, Polaris Sportsman 400, Yamaha Kodiak 400, Can-Am Outlander 400.
Value Proposition:
Offers a balance of performance, reliability, and affordability, making it a strong contender in its class. The availability of both automatic and manual transmission options broadens its appeal.
Manual Benefit:
Empowers owners to perform their own maintenance and repairs, saving significant costs and extending the lifespan of their ATV.
Engine:
Detailed breakdown of the 376cc single-cylinder, liquid-cooled engine including fuel injection, ignition, lubrication, cooling, and emission control systems.
Transmission:
Coverage for the QuadMatic automatic transmission (CVT) and the 5-speed manual transmission (LT-F400F), including belt inspection, clutch operation, and gearshift mechanisms.
Drivetrain:
Front and rear driveshafts, differential, axle boots, and hub assemblies, including service and repair procedures.
Suspension:
Front and rear independent suspension, shock absorbers, A-arms, bushings, and steering linkage.
Brakes:
Front and rear hydraulic disc brake systems, including caliper service, pad replacement, fluid flush, and master cylinder.
Electrical System:
Charging system (stator, regulator/rectifier), starting system (starter motor, battery), lighting (headlights, taillights, brake lights), and instrumentation.
Fuel System:
Fuel injection system (throttle body, injectors, fuel pump, pressure regulator), and fuel tank components.
Cooling System:
Radiator, fan, water pump, thermostat, and coolant passages.
Frame And Bodywork:
Frame inspection, body panel removal and installation, seat, fenders, and racks.
Maintenance:
Regular scheduled maintenance, oil changes, filter replacements, spark plug service, valve clearance adjustment, chain lubrication and adjustment (if applicable), brake fluid changes, coolant flushes.
Troubleshooting:
Diagnostic charts and procedures for common issues, fault code interpretation (if applicable), and systematic problem-solving for engine, electrical, and drivetrain problems.
Engine Repair:
Top-end rebuild (cylinder head, piston), bottom-end overhaul (crankshaft, connecting rod), gasket replacement, timing chain inspection and replacement.
Transmission Repair:
CVT belt replacement, clutch service, manual gearbox disassembly and reassembly.
Electrical Diagnostics:
Wiring diagrams, component testing, ignition system troubleshooting, charging system testing.
Suspension And Steering:
Shock absorber adjustment and replacement, ball joint replacement, steering column and linkage service.
Brake System Service:
Brake pad replacement, rotor resurfacing/replacement, caliper overhaul, brake line replacement, bleeding procedures.
Depth Of Coverage:
Comprehensive, covering everything from basic maintenance and inspections to full engine and transmission rebuilds, electrical system diagnostics, and chassis component overhauls.
Engine Type:
4-stroke, SOHC, 4-valve, Single-cylinder
Displacement:
376 cc (23.0 cu. in.)
Bore X Stroke:
81.0 mm x 72.0 mm (3.19 in. x 2.83 in.)
Cooling System:
Liquid-cooled
Estimated Horsepower:
Approximately 26-28 HP (specific figures can vary slightly by year and test conditions)
Estimated Torque:
Approximately 22-24 lb-ft (specific figures can vary slightly by year and test conditions)
Fuel Delivery:
Suzuki Fuel Injection (SDFI) - Electronic Fuel Injection (EFI)
Fuel Type:
Unleaded gasoline, 87 octane or higher recommended.
Ignition System:
Electronic ignition (CDI)
Atv Safety Standards:
Designed to meet industry safety standards for ATVs. (Specific crash test data is not typically published for ATVs in the same way as passenger cars).
Braking System:
Dual front hydraulic disc brakes, sealed rear hydraulic disc brake.
Engine Braking:
Standard on QuadMatic™ transmission for controlled descents.
Lighting:
Twin headlights, taillight, and brake light.
Ergonomics:
Designed with rider comfort and control in mind, including handgrips, throttle, and brake lever placement.
Instrument Cluster:
Digital LCD multi-function display including speedometer, odometer, trip meter, clock, fuel gauge, 2WD/4WD indicator, and transmission position indicator (for LT-A400F).
Selectable 4Wd:
Electronically selectable 2WD/4WD system with shaft drive for front and rear wheels.
Diagnostic Ports:
While not 'connectivity' in the automotive sense, the manual will detail diagnostic procedures that may involve connecting specialized tools or testers.
Engine Oil Change:
Every 1,000 km or 12 months (whichever comes first), or more frequently under severe use (refer to manual for specific interval).
Air Filter Cleaning:
Check and clean every 200 km or monthly; replace as needed.
Spark Plug Replacement:
Check and clean as needed; replace at recommended intervals (e.g., 4,000 km or annually).
Valve Clearance Adjustment:
Initial check at 1,000 km, then every 4,000 km or annually. Critical for performance and engine longevity.
Engine Oil Type:
Suzuki recommends API SG or higher, SAE 10W-40 viscosity oil. (Always verify with the official manual for the precise specification).
Engine Oil Capacity:
Approx. 2.0 L (2.1 US qt) with filter change. (Refer to manual for exact capacity).
Coolant Type:
Suzuki Super Long Life Coolant or equivalent ethylene glycol-based coolant (50/50 mixture with distilled water).
Brake Fluid Type:
DOT 4 brake fluid.
Common Wear Items:
CVT belts can wear over time and require replacement. Bushings in suspension and steering components can wear, leading to looseness. Regular lubrication of pivot points and linkages is important.
Efi System Considerations:
Ensure the air filter is clean to prevent dirt ingress into the throttle body and injectors. Periodic injector cleaning might be beneficial.