1979-1985 Kawasaki KZ400, KZ500, KZ550 Service & Repair Manual

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Kawasaki Models Covered & Key Technical Specifications

Models: Kawasaki KZ400, KZ500, KZ550
Sub-models / Variants: B1
Model Years: 1979–1981
Technical Data:

  • Engine type: DOHC, 4-cylinder, 4-stroke, air-cooled
  • Displacement: 497 cc
  • Bore and stroke: 55.0 x 52.4 mm
  • Compression ratio: 9.5
  • Max power: 52 HP @ 9,000 rpm
  • Max torque: 4.5 kg-m @ 7,500 rpm
  • Lubrication: Forced Lubrication (wet sump)
  • Transmission: 6-speed, constant mesh, return shift
  • Clutch: Wet multi disc
  • Ignition timing: From 10° BTDC @ 1,050 rpm to 35° BTDC @ 3,200 rpm
  • Spark plug: NGK D8EA or ND X24ES-U
Technical Specifications
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Document Number / Seller:
26270 / Ronald Lee
File Size:
28.91 MB
File Type:
ZIP
Language:
English
Printable:
Yes
Category:
Bike
Last updated / verified
Jun 11, 2026

Kawasaki Manual Features & Content Preview

1979–1981 Kawasaki KZ400, KZ500, KZ550 Motorcycle Service Manual

  • Covers the 1979–1981 Kawasaki KZ400, KZ500, and KZ550 line, specifically detailing the KZ500-B1 configuration.
  • Official Kawasaki publication (revised February 17, 1981) containing 100 pages of factory specs, maintenance schedules, and assembly diagrams.
  • Instant download ensures you have immediate access to essential repair data on any device.
  • Fully searchable OCR text layer lets you jump straight to specific torque specs.
  • Formatted for standard letter and A4 printing for easy workshop reference.

Engine and Chassis Specifications

This factory publication serves as the primary technical reference for the B1-series build. It outlines the foundational mechanical and electrical service specifications for the 497 cc DOHC 4-cylinder engine and its 6-speed constant mesh transmission. Inside, technicians will find comprehensive component reviews covering valve clearance adjustments, ignition timing synchronization using contact breakers, and detailed carburetor data—including the fast idle mechanism and vacuum synchronization necessary for optimal running conditions.

Workshop Utility and Technical Depth

Having accurate factory data minimizes guesswork on the bench. The documentation provides critical torque values, specifying 13.5 kg-m (98 ft-lbs) for the clutch hub nut and 7.0 kg-m (51 ft-lbs) for the alternator rotor bolt. Multi-stage cylinder head tightening sequences are clearly mapped out, culminating in a final torque of 2.3 kg-m (16.5 ft-lbs). The engine specification table lists intake valve clearances at 0.10–0.20 mm alongside a defined oil capacity of 3.0 liters (with filter change). Before beginning any deep mechanical assessment or repair planning, always secure the motorcycle on a stable lift and disconnect the battery to ensure personal safety and prevent electrical shorts. Maintenance schedules define the exact inspection intervals for critical systems like the steering head bearings and swing arm lubrication.

Technical Safety Notice
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This official OEM document is intended for professional technicians and skilled operators. Performing service on mechanical equipment involves inherent risks. By purchasing, you acknowledge that RepairLoader provides original manufacturer data for informational purposes. Always prioritize safety: use correct tools, wear protective gear, and consult a certified professional if you are uncertain of any procedure.

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