1989-1990 Honda GB500 Service Manual

Field service reference for 1989-1990 Honda GB500 — includes engine, transmission, and electrical system procedures. Publication C4085-91017

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Honda Models Covered & Key Technical Specifications

Models: Honda GB500
Build Years: 1989–1990
Technical Data:

  • Engine: Air-cooled 4-stroke single cylinder
  • Displacement: 498 cc
  • Bore and Stroke: 92.0 x 75.0 mm
  • Transmission: 5-speed constant mesh
  • Compression Ratio: 8.9:1
  • Fuel System: Piston valve single carburetor (VE30A)
  • Tire Size: 90/90-18 51S (Front), 110/90-18 61S (Rear)
Technical Specifications
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Document Number / Seller:
26429 / Steven Peterson
File Size:
14.67 MB
File Type:
ZIP
Language:
English
Printable:
Yes
Category:
Bike
Last updated / verified
Apr 28, 2025

Honda Manual Features & Content Preview

1989–1990 Honda GB500 Technical Documentation

  • Built for owners and workshops servicing the 1989–1990 Honda GB500, covering standard maintenance, lubrication, fuel system, and cylinder head specifications
  • Official Honda Motor Co., Ltd. 1989 publication
  • Contains 47 detailed exploded-view diagrams and 6 torque-value specification tables
  • Downloads to your account within seconds of checkout
  • Indexed PDF search covers every chapter and appendix
  • Re-download the file any time, no expiration
  • This 1989 publication serves as the primary technical reference for the GB500 platform, documenting precise tolerances for engine and chassis systems

Engine and Maintenance Overview

The 1989–1990 Honda GB500 service manual details routine inspection and maintenance procedures for the air-cooled 498 cc single-cylinder engine. Chapters organize requirements for oil level checks, filter changes, and air cleaner servicing, along with specific guidance on maintaining the fuel system and secondary air supply. Information on drive chain adjustment, brake systems, and suspension components provides owners with the necessary reference values to keep the 1989–1990 Honda GB500 in factory condition.

Technical Specifications and Data

Detailed tables document critical measurements, including engine torque values, valve clearance settings, and electrical reference points. Valve clearance for the intake is listed at 0.10 mm and 0.12 mm for the exhaust in the cylinder head specification table. The manual specifies cylinder compression at 125 kPa (178 psi) for the 1989–1990 Honda GB500. For further technical details, visit what an OEM service publication covers to understand how these factory manuals are structured. Fuel tank capacity is documented at 16.5 liters, with an idle speed range of 1,200 ± 100 rpm. This is an official Honda factory service manual covering the 1989–1990 Honda GB500, providing complete technical documentation for engine, chassis, and emission control systems.

Document Reference: Honda Motor Co., Ltd. 1989

Manual FAQ, Purchase & Download Details

What documentation is provided regarding cable and harness routing for the Honda GB500? keyboard_arrow_down

General information chapter contains visual diagrams and guidelines that reference the correct routing paths for wires, cables, and harness components.

Is there information in the manual that previews the inclusion of emission control systems? keyboard_arrow_down

Document includes dedicated sections detailing the crankcase and exhaust emission control systems. These pages also provide references for vacuum hose routing diagrams used on specific models.

Are specification tables included that list tightening torque values for engine and frame components? keyboard_arrow_down

Comprehensive tables are provided in the general information section that categorize torque values by component and thread diameter. These tables serve as a quick reference for standard tightening specifications.

Which publication year is noted on the cover page of this service manual? keyboard_arrow_down

Document cover page identifies this manual as a publication released in nineteen eighty-nine for the Honda GB500.

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