Primary Coverage:
Maintenance, Repair, Diagnostics, Troubleshooting, Specifications
Specific Systems Covered:
Engine, Fuel System, Lubrication System, Cooling System, Chassis, Electrical System, Emission Control
Estimated Page Count:
Varies by specific edition, typically 300-500+ pages for comprehensive factory manuals.
Manual Type:
Factory Workshop Manual
Engine Internal Components:
Cylinder head, camshaft, cylinder, piston, crankshaft, connecting rod, valves, valve timing
Fuel And Lubrication:
Fuel tank, fuel lines, carburetor (e.g., Mikuni BSR36/42), fuel pump, oil system, oil pump, oil filter, oil cooler (if equipped)
Cooling System:
Radiator, cooling fan, fan thermoswitch, coolant temperature thermoswitch, thermostat, water pump, coolant specifications
Chassis And Suspension:
Front wheel, front fork (e.g., Kayaba USD), steering head bearings, rear wheel, swingarm, rear shock absorber, linkages, rear suspension adjustments
Braking System:
Front brake caliper, master cylinder, brake fluid specifications, brake pads, rear brake caliper, brake lines, brake discs
Electrical System:
Battery specifications, charging system (stator, regulator/rectifier), starter motor, ignition system (CDI, ignition timing), lighting, relays, switches, fuses, speedometer operation
Emission Control:
Evaporative emission control system (EVAP), canister, carburetor emission components, idle speed control, emissions test procedures
Periodic Maintenance:
Detailed maintenance schedule, air filter cleaning/replacement, spark plug inspection/replacement, valve clearance adjustment (tappet clearance), fuel line inspection, engine oil change, drive chain adjustment/lubrication, brake system inspection, tire pressure checks, spoke tensioning, steering head bearing adjustment
Engine Repair:
Engine removal/installation, complete engine disassembly, component inspection (e.g., wear limits for piston rings, cylinder bore), engine reassembly, torque specifications for all fasteners
Chassis Repair:
Front fork seal replacement, front fork oil change and level setting, steering head bearing replacement, wheel bearing service, swingarm bearing service, rear shock absorber service/replacement
Electrical Diagnostics:
Troubleshooting electrical faults, testing charging system output, ignition system testing, starter circuit testing, multimeter usage for diagnostics
Fuel System Service:
Carburetor cleaning and adjustment, jetting information, fuel pump testing, fuel filter replacement
Diagnostic Capabilities:
Advanced diagnostics including component testing, circuit analysis, and troubleshooting flowcharts
Rebuild Capabilities:
Complete engine and component rebuild procedures with detailed diagrams and specifications
Illustrations And Diagrams:
Clear, step-by-step illustrations and exploded view diagrams for all procedures
Engine Type:
4-stroke, Single-cylinder, DOHC, 4-valve
Displacement:
398 cc (24.3 cu in)
Bore X Stroke:
90.0 mm x 78.5 mm (3.54 in x 3.09 in)
Cooling System:
Liquid-cooled
Compression Ratio:
11.3:1
Horsepower Approx:
Approximately 35-40 HP (Varies by market and specific tuning)
Torque Approx:
Approximately 26-30 lb-ft (Varies by market and specific tuning)
Carburetor Type:
Mikuni BSR36 (DR-Z400S/SM) or BSR42 (DR-Z400E/SM - later models) CV carburetor
Fuel Capacity:
Approximately 10.0 L (2.6 US gal)
Oil Type Specification:
SAE 10W-40 API SG or SH, JASO MA certified motorcycle oil
Oil Capacity With Filter:
Approximately 2.0 L (2.1 US qt)
Overall Length:
Approximately 2,255 mm (88.8 in)
Overall Width:
Approximately 825 mm (32.5 in)
Overall Height:
Approximately 1,165 mm (45.9 in)
Dry Weight Approx:
Approximately 116 kg (255.7 lbs) for DR-Z400S
Curb Weight Approx:
Approximately 132 kg (291 lbs) for DR-Z400S (with all fluids)
Wheelbase:
Approximately 1,460 mm (57.5 in)
Ground Clearance:
Approximately 300 mm (11.8 in)
Seat Height:
Approximately 935 mm (36.8 in)
Engine Oil Change Interval:
Every 3,000 km (1,800 miles) or 6 months.
Air Filter Cleaning Interval:
Every 1,000 km (600 miles) or more frequently in dusty conditions.
Spark Plug Inspection Interval:
Every 6,000 km (3,600 miles).
Valve Clearance Check Interval:
Every 6,000 km (3,600 miles).
Drive Chain Lubrication Adjustment:
Every 1,000 km (600 miles) or as needed.
Coolant Type:
High-quality ethylene glycol-based antifreeze coolant (50% mixture with distilled water)
Common Wear Items:
Drive chain and sprockets, brake pads, tires, wheel bearings, steering head bearings, fork seals. Carburetor can sometimes require tuning or cleaning due to ethanol fuels.
Common Performance Tips:
Regular cleaning and proper adjustment of the carburetor, ensuring correct air filter maintenance, and proper chain care are crucial for optimal performance.