Quad Segment:
Sport/Recreational ATV
Target Audience:
Enthusiast riders, recreational off-roaders, trail riders.
Key Competitors:
Yamaha Raptor 350/660, Honda TRX400EX/TRX450R, Kawasaki KFX400/KFX450R.
Vehicle Reputation:
Known for its reliable and punchy engine, agile handling, and user-friendly nature, making it a popular choice for both novice and experienced riders.
Engine Mechanical:
Engine disassembly, assembly, inspection, tuning, timing, valves, piston, crankshaft, connecting rod, cylinder head, cylinder block, lubrication system.
Fuel System:
Carburetor service (cleaning, adjustment, rebuilding), fuel pump, fuel filter, fuel tank.
Ignition System:
Ignition coil, CDI unit, spark plug, timing.
Transmission Drivetrain:
Clutch inspection and replacement, gearbox disassembly and assembly, final drive, chain drive, drive shaft maintenance.
Cooling System:
Radiator, fan, hoses, thermostat, coolant flush and replacement.
Brake System:
Hydraulic brake system, caliper overhaul, master cylinder, brake lines, brake pads, brake fluid flush, parking brake.
Suspension Steering:
Front and rear suspension components, shocks, springs, linkages, steering system, tie rods, ball joints, wheel alignment.
Electrical System:
Wiring diagrams, battery, charging system (stator, rectifier/regulator), starter motor, lighting, switches, fuses, relays.
Frame Bodywork:
Frame inspection, body panel removal and installation, seat, handlebars, footpegs, fenders.
Maintenance Schedule:
Regular service intervals for oil changes, filter replacements, chain lubrication, spark plug checks, brake inspections, and valve clearance checks.
Troubleshooting Guides:
Diagnostic procedures for common issues, symptom-based troubleshooting charts, error code explanations (if applicable).
Repair Procedures:
Step-by-step instructions for component removal, installation, disassembly, and reassembly with torque specifications.
Rebuild Procedures:
Detailed instructions for overhauling major components like the engine and transmission.
Wiring Diagrams:
Complete electrical schematics for fault finding and component identification.
Depth Level:
Comprehensive (from basic maintenance to complete engine/transmission rebuilds and diagnostics)
Engine Type:
4-stroke, Single-cylinder, DOHC, 4-valve
Displacement:
398 cc (24.3 cu. in.)
Bore X Stroke:
90.0 mm x 73.8 mm (3.54 in. x 2.91 in.)
Compression Ratio:
11.3:1
Horse Power:
Approximately 35-40 HP (varies by tune and specific market regulations)
Torque:
Approximately 25-28 lb-ft (varies by tune and specific market regulations)
Fuel Delivery:
Mikuni BSR36 carburetor
Fuel Type:
Unleaded gasoline
Fuel Tank Capacity:
2.6 US gal (10 L)
Oil Type:
Suzuki Performance 4-stroke Engine Oil (10W-40 recommended, check manual for specific API/JASO rating)
Oil Capacity:
Approx. 1.7 L (1.8 US qt) without filter change, 1.9 L (2.0 US qt) with filter change.
Cooling Method:
Liquid-cooled
Atv Safety Considerations:
Designed for recreational off-road use. Operator training and protective gear (helmet, eye protection, gloves, boots, long sleeves/pants) are mandatory.
Braking System:
Hydraulic disc brakes front and rear.
Parking Brake:
Mechanical disc brake on rear axle, operated by hand lever.
Frame Construction:
High-tensile steel frame for rigidity and durability.
Engine Oil Change:
Every 1000 km (620 miles) or 6 months, whichever comes first. Also recommended after severe use.
Oil Filter Replacement:
At every engine oil change.
Air Filter Cleaning:
Every 200 km (125 miles) or monthly, clean and re-oil. Replacement as needed.
Spark Plug Inspection:
Every 1000 km (620 miles).
Valve Clearance Check:
Every 2000 km (1250 miles) or 12 months.
Chain Lubrication Adjustment:
Every 200 km (125 miles) or after washing/rain.
Brake Fluid Type:
DOT 4 hydraulic brake fluid.
Coolant Type:
Suzuki Genuine Coolant or equivalent high-quality ethylene glycol-based coolant (50% solution with distilled water).
Common Wear Items:
Clutch plates, brake pads, wheel bearings, chain and sprockets, tie rod ends due to aggressive riding or off-road use.
Engine Issues:
Potential for cam chain tensioner wear over time (leading to ticking noise); carburetor jetting may need adjustment for altitude or exhaust modifications.
Electrical Issues:
Stator or regulator/rectifier failure can occur with age and heat.
Suzuki Atv Legacy:
Suzuki has a long and successful history in ATV manufacturing, with the LT-Z series being a cornerstone of their sport ATV lineup.
Ltz400 Development:
The LT-Z400 was first introduced in 2003, sharing a platform with the Kawasaki KFX400. It has undergone various updates for styling, suspension, and engine tuning over its production run.
Manufacturing Location:
Primarily manufactured in Japan.
Production Years:
2003 - 2008 (as LT-Z400), continued as LT-Z400K9 (2009) and LT-Z400L0 (2010) with minor updates before being superseded by the LT-R450 and later models.
