Product Category:
High-performance Sport ATV
Target Audience:
Enthusiasts, racers, recreational riders, mechanics
Key Competitors:
Yamaha YFZ450, Honda TRX450R, Kawasaki KFX450R
Manual Utility:
Provides the technical knowledge necessary for DIY maintenance and repair, reducing labor costs and downtime.
Manual Value Proposition:
Essential for owners seeking to maintain, repair, or restore their LTZ400 to peak performance.
Engine System:
Full coverage of engine assembly, disassembly, inspection, and repair
Fuel System:
Carburetor tuning, fuel pump, fuel lines, fuel tank maintenance
Ignition System:
CDI, ignition coil, spark plug diagnosis and replacement
Cooling System:
Radiator, cooling fan, coolant flow, thermostat
Transmission System:
Clutch operation, gear selection, internal transmission components, lubrication
Drivetrain:
Chain drive, sprockets, rear axle, wheel hub maintenance
Suspension System:
Front A-arms, rear swingarm, shock absorbers, springs, bushings
Brake System:
Hydraulic brake system, front and rear calipers, brake lines, master cylinders, brake pads, rotors
Electrical System:
Wiring diagrams, battery, charging system, lighting, starter motor, switches
Steering System:
Handlebars, steering stem, tie rods, steering knuckles
Chassis Frame:
Frame inspection, welds, component mounting points
Bodywork Plastics:
Body panel removal, installation, and repair
Maintenance Procedures:
Routine maintenance checks, oil changes, filter replacements, lubrication schedules
Troubleshooting Guides:
Diagnostic charts and procedures for common problems
Repair Procedures:
Step-by-step instructions for major and minor component repairs
Rebuilding Procedures:
Detailed instructions for engine and transmission rebuilds
Restoration Guidance:
Information applicable to refurbishing older models
Torque Specifications:
All critical torque values for fasteners and bolts
Wiring Diagrams:
Comprehensive electrical system schematics
Depth Level:
Comprehensive (covers everything from basic maintenance to full engine rebuilds)
Diagnostic Capabilities:
Detailed troubleshooting steps for identifying and resolving issues
Component Identification:
Clear identification and function of all major components
Engine Type:
Four-stroke, Liquid-cooled, DOHC, 4-valve, Single-cylinder
Engine Displacement:
398 cc (24.3 cu. in.)
Bore X Stroke:
90.0 mm x 71.0 mm (3.54 in. x 2.80 in.)
Compression Ratio:
11.3:1
Horsepower Estimate:
Approximately 40-45 HP (Varies by tuning and exhaust)
Torque Estimate:
Approximately 26-28 lb-ft (Varies by tuning and exhaust)
Carburetor:
Mikuni BSR36, 36mm, with accelerator pump
Fuel Capacity:
2.6 US gal. (9.8 L)
Oil Type:
SAE 10W-40 API SG or higher, JASO MA certified
Oil Capacity With Filter:
2.1 US qt. (2.0 L)
Initial Break In Service:
Check and adjust valve clearance, change oil and filter at 600 miles (1,000 km)
Regular Oil Change:
Every 1,200 miles (2,000 km) or 6 months
Air Filter Cleaning:
Every 600 miles (1,000 km), or more frequently in dusty conditions
Chain Lubrication Adjustment:
Every 300 miles (500 km) or as needed
Valve Clearance Check:
Every 1,800 miles (3,000 km)
Engine Oil Spec:
SAE 10W-40 API SG or higher, JASO MA certified
Engine Oil Capacity:
2.1 US qt. (2.0 L) with filter change
Transmission Oil Spec:
SAE 80W API GL-4
Coolant Type:
Mixture of ethylene glycol-based coolant and distilled water (50/50 ratio)
Common Wear Items:
Clutch plates, brake pads, wheel bearings, tie rod ends, chain and sprockets
Carburetor Tuning Considerations:
Accelerator pump function, jetting for altitude and modifications (covered in manual)
Cooling System Efficiency:
Ensuring proper coolant flow and fan operation is critical for preventing overheating
