Market Position:
The Suzuki Eiger LT-A400 series was positioned as a capable, mid-range utility ATV, appealing to riders seeking a balance of performance and affordability for recreational riding and light to moderate work tasks.
Competitors:
Competed with models from Yamaha (Grizzly), Honda (FourTrax), Kawasaki (Bayou/Brute Force), and Polaris (Sportsman) in the mid-size utility ATV segment.
Key Features:
Single-cylinder engine, automatic transmission, selectable 2WD/4WD (on 4x4 models), independent front suspension, robust chassis, reliable performance for its class.
Suspension Type:
Independent front suspension (double A-arm), Swingarm rear suspension with shock absorber.
Engine Systems:
Engine removal/installation, lubrication, cooling, cylinder head, piston, crankshaft, camshaft, valve timing, carburetor (or fuel injection if applicable), ignition system, starter motor, compression tests, internal engine repairs.
Transmission Drivetrain:
Automatic transmission operation and repair, drive chain adjustment and replacement, sprocket inspection and replacement, final drive, CV joints, propeller shafts (for 4x4 models).
Fuel System:
Fuel tank, fuel lines, fuel filter, carburetor/fuel injection system, fuel pump, fuel system diagnostics.
Electrical System:
Wiring diagrams, battery, charging system (alternator/stator, rectifier/regulator), starting system, lighting, instrumentation, switches, fuses, relays, troubleshooting electrical faults.
Suspension Steering:
Front and rear suspension systems, shock absorbers, springs, control arms, bushings, steering system components, tie rods, steering linkage, alignment procedures.
Brakes:
Hydraulic brake system (front and rear), brake calipers, master cylinders, brake lines, brake pads, brake disc inspection and replacement, bleeding procedures, parking brake.
Bodywork Chassis:
Frame inspection, body panels, plastic components, fenders, seat, rack systems, removal and installation of body parts.
Routine Maintenance:
Oil changes, filter replacement, air filter cleaning/replacement, spark plug inspection/replacement, valve clearance checks, lubrication points, drive chain maintenance.
Troubleshooting:
Diagnostic charts, common problems and solutions, symptom-based troubleshooting for engine, electrical, and mechanical issues.
Rebuild Procedures:
Detailed instructions for engine overhauls, transmission rebuilds, carburetor overhaul, brake caliper rebuilds, and other major component repairs.
Torque Specifications:
Crucial torque values for engine components, suspension, wheels, and other critical fasteners.
Ignition System Repair:
Spark plug, ignition coil, CDI unit, stator testing and replacement.
Cooling System Service:
Radiator flushing, coolant replacement, fan operation checks, thermostat service.
Wheel Tire Service:
Tire pressure checks, tire rotation, wheel bearing inspection and replacement, wheel bolt torque specifications.
Electrical Troubleshooting Guides:
Flowcharts and detailed guides for diagnosing common electrical faults.
Depth:
Comprehensive from basic checks to complete engine and transmission rebuilds. Suitable for DIY enthusiasts and professional mechanics.
Diagnostic Tools Recommended:
Basic hand tools, torque wrench, multimeter, feeler gauges, compression tester, specialized tools for certain engine components (as specified within the manual).
Engine Type:
4-stroke, SOHC, 1-cylinder, liquid-cooled (often oil-cooled assist)
Displacement:
376 cc (23.0 cu. in.)
Bore X Stroke:
85.0 mm x 66.0 mm
Compression Ratio:
9.2:1 (typical, verify with manual)
Horsepower:
Approximately 25-28 HP (verify with manual)
Torque:
Approximately 22-24 lb-ft (verify with manual)
Fuel Delivery:
Carburetor (e.g., Mikuni BSR33)
Fuel Type:
Unleaded gasoline, 87 octane or higher
Fuel Tank Capacity:
3.1 US gal (11.7 L)
Oil Type:
SAE 10W-40 API SE, SF, SG, SH, SJ or higher (verify with manual for specific viscosity and API rating)
Oil Capacity With Filter:
2.2 US qt (2.1 L)
Cooling Method:
Liquid-cooled (with fan)
Coolant Type:
Permanent antifreeze solution, 50/50 mix of ethylene glycol and distilled water
Transmission Type:
Automatic (CVT with V-belt drive)
Transmission Gears:
High, Low, Neutral, Reverse (H, L, N, R)
Drive System:
Shaft drive to rear differential; Shaft drive to front differential (4x4 models), with electronic push-button engagement for 4WD.
Final Drive Fluid Type:
SAE 80W API GL-5 hypoid gear oil
Final Drive Fluid Capacity:
160 ml (0.17 US qt) for front/rear differentials
Engine Oil Change:
Every 100 hours or 1 year (whichever comes first), or more frequently in severe use.
Air Filter Cleaning:
Every 20 hours, or more frequently in dusty conditions.
Spark Plug Check:
Every 100 hours or 1 year. Replace as needed based on condition.
Valve Clearance Check:
Every 100 hours or 1 year.
Brake Fluid:
DOT 3 or DOT 4 hydraulic brake fluid.
Common Issues:
Potential for carburetor issues (clogging, adjustment), CV joint wear, and starter motor solenoid problems. Some models may experience cam chain tensioner noise over time. The manual will detail checks and fixes for these.
Maintenance Tips:
Regular cleaning and proper storage can prevent many common issues, especially related to the carburetor and electrical connections in wet environments. The manual provides specific cleaning procedures.
