2003-2004 Kawasaki KFX400 All Terrain Vehicle Service Manual

This manual details servicing and overhaul procedures for the Kawasaki KFX400, KFX400-A1, and KFX400-A2 models. It covers engine, chassis, fuel, and electrical systems. P/N 99000-11550-041

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Kawasaki Models Covered & Key Technical Specifications

Models: Kawasaki KSF400-A1, Kawasaki KSF400-A2, Kawasaki KSF400-A3
Sub-models / Variants: KFX400, Canada, Europe, U.S.A., California
Trade Names: KFX400
Build Years: 2003–2005
Technical Data:

  • Engine type: 4-stroke, DOHC, 1-cylinder, liquid-cooled
  • Displacement: 398 mL (24.3 cu in)
  • Bore and stroke: 90.0 mm x 62.6 mm
  • Compression ratio: 11.3:1 (A1, A2), 11.2:1 (A3)
  • Transmission: 5-speed and 1-reverse, constant mesh, return shift
  • Lubrication system: Forced lubrication (Dry sump)
  • Ignition system: Electronic ignition (CDI)
  • Spark plug: NGK CR8EA or ND U22 ESR-N
  • Engine oil capacity: 2.2 L (total), 2.0 L (change), 2.1 L (filter change)
  • Cooling fan thermo-switch operating temperature: 88°C (190°F)
  • Valve clearance (cold): Intake 0.10–0.20 mm, Exhaust 0.20–0.30 mm
  • Drive chain: RK 520KZO (96 Links)
Technical Specifications
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Document Number / Seller:
29990 / Michelle Wright
File Size:
10.98 MB
File Type:
PDF
Language:
English
Pages:
381
Printable:
Yes
Category:
ATV
Last updated / verified
Feb 27, 2025

Kawasaki Manual Features & Content Preview

2003–2005 Kawasaki KFX400 Service Documentation

  • Covers the 2003–2005 Kawasaki KSF400-A1 through A3 (KFX400) featuring liquid-cooled 398 cc four-stroke DOHC engines and 5-speed constant-mesh transmissions with reverse
  • Original OEM publication, Third Edition dated August 20, 2004, including the supplementary coverage for the KSF400-A1 model line
  • Contains 381 pages of detailed technical specifications, torque values, exploded-view diagrams, and maintenance schedules for chassis and engine systems
  • Delivered as a direct download the moment payment clears
  • Indexed PDF search covers every chapter and appendix
  • Accessible from your device as soon as the order is placed
  • Suitable for printing individual sections for shop-floor use
  • This 2004 third edition is the primary source for the KSF400 series maintenance intervals and contains the vital valve clearance adjustment charts for both intake and exhaust valves

Manual Organization and Content

The 381-page manual follows the standard Kawasaki grouping to categorize the KSF400 systems. It includes sections on general information, periodic maintenance schedules, engine disassembly and reassembly, fuel system specifications for various regions (including California-specific emission requirements), cooling and lubrication circuit data, and chassis-specific maintenance covering the front and rear suspension, steering, and braking components. Experts use the provided index to quickly navigate to specific sub-systems like the balancer shaft, starter torque limiter, or the gearshift cam and fork assembly.

Engineering Data Preview

Technical data provided includes specific torque values such as the 180 N·m (130 ft·lb) rear axle locknut specification and the 23 N·m (16.5 lb-ft) exhaust pipe nut requirement. Valve clearance for the intake is listed at 0.10–0.20 mm in the cylinder head specification table. The cooling fan thermo-switch operates at approximately 88°C (190°F) to ensure thermal stability. Electrical reference values for the three-phase AC generator are documented at 14 V at 4 000 r/min. Fluid capacities are clearly defined, listing 2.2 liters for engine oil during a complete engine overhaul. A 381-page official Kawasaki OEM service publication covering the 2003–2005 KFX400, documenting engine, chassis, electrical, and fuel-injection specifications for the KSF400-series build.

Manual FAQ, Purchase & Download Details

What technical reference data is included in the specification tables for the KSF400-A1 through A3 models? keyboard_arrow_down

Specification tables include details such as engine displacement, compression ratios, bore and stroke dimensions, and gear ratios for the transmission. These tables also list capacity data for the fuel tank and engine oil.

Is there a breakdown of engine components that can be accessed while the engine remains in the frame? keyboard_arrow_down

Manual includes a dedicated section that lists specific parts, such as the engine sprocket, generator rotor, and clutch components, which can be serviced without requiring full engine removal.

Are there reference charts available for managing valve clearances during routine maintenance? keyboard_arrow_down

Yes, the document provides detailed valve clearance adjustment charts for both the inlet and exhaust valves. These charts include information on present shim sizes and help in determining the correct shim replacement based on measured clearance values.

Which system sections contain information regarding tightening specifications for vehicle fasteners? keyboard_arrow_down

General Information and maintenance sections reference the use of a torque wrench for fasteners and indicate that service data, including specified torque values, is marked throughout the manual with a designated symbol.

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