1986 Yamaha YZ80 Motorcycle Repair Manual

1986 YZ80 with repair procedures for engine, chassis, and electrical systems. Includes diagnostic flowcharts. Ref: 1RLR000

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Document Details

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Document Number / Seller:
27360 / David Owens
File Size:
34.57 MB
File Type:
ZIP
Language:
English
Printable:
Yes
Category:
Bike
Last updated / verified
Aug 30, 2025

Models Covered & Key Technical Specifications

1986 Yamaha YZ80 (1RLR000) -- 1986 Service Manual | Volume

  • System Alignment Specs: 25 Nm (2.5 m•kg, 18 ft-lb) is specified as the torque for the cylinder head nuts. Requirements.
  • Maximum Wattage Specs: 35 Nm (3.5 m•kg, 25 ft-lb) requires careful application for the magneto nut. Threshold.
  • Measured Operating Temps: For optimal cooling system performance, 109.7 +/- 15 kPa (1.1 kg/cm², 16 psi) specifies the valve opening pressure. Mapping.
  • Published Angular Speed: The engine speed for the ignition timing graph reaches 10 x 10^3 r/min. Configuration.
  • Authorized Optical Resolution: 0.060 ~ 0.065 mm (0.0024 ~ 0.0026 in) defines the piston clearance. Benchmarks.
  • Technical Play Limits: 0 ~ 1.0 mm (0 ~ 0.04 in) controls the standard swingarm side play. Range.

Professional Workshop Service Manual & Technical Specifications

Verified Shop Training Manual: Bike Yamaha YZ80 manual, 1986 Knowledge-Base

Component-Focus: 1986 Yamaha YZ80 manual // Architecture-Focus: Bike / Engine Logic // Component-Focus: engine, chassis, electrical details.

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Specification Parameters Logic
Model YZ80 Bike
Year 1986 Model
Manual Type Repair Manual Document

Factory procedures are documented for:

Index

  • General Information
  • Regular Maintenance and Adjustment
  • Engine Maintenance and Repair
  • Chassis Maintenance and Repair
  • Electrical Troubleshooting

This manual covers the intricate systems of the 1986 Yamaha YZ80 motorcycle. Detailed explanations and diagrams guide the user through maintenance and repair tasks. Correctly requiring proper functioning, the document details procedures for the engine, chassis, and electrical systems, ensuring optimal performance.

Engine Maintenance and Repair

This section delves into the core components of the YZ80 engine. It includes disassembly and assembly instructions for the cylinder head, cylinder, piston assembly, crankshaft, and cooling system. Diagnostic procedures for common issues are also provided.

Chassis Maintenance and Repair

Focusing on the bike's frame and running gear, this part of the manual documents procedures for wheel assemblies, sprockets, chain, front and rear brakes, front forks, steering head, rear shock, and swingarm. It includes inspection and adjustment guidelines.

Electrical Troubleshooting

This section provides a wiring diagram and troubleshooting guides for the ignition system. It covers testing of the CDI magneto, spark plug, and ignition coil, offering solutions for common electrical faults.

This manual documents torque specifications for engine and chassis components to ensure proper corrosion joint prevention.

FAQ

Specify the **applicable** lubrication requirements for the drive chain. keyboard_arrow_down

30-35 mm (1.18 ~ 1.38 in) is the specified drive chain length for 10 links.

What is the **exact** testing parameters for the CDI magneto charge coil? keyboard_arrow_down

505Ω ± 10% (Brown - Black) is the specified source coil resistance.

Calculate the **specific** diagnostic procedures for poor high-speed performance. keyboard_arrow_down

10.4Ω ± 10% (White/Green - White/Red) is the pulser coil resistance, crucial for diagnosing high-speed performance issues.

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Reviews (2)

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This repair manual is a must-have for anyone working on a 1986 Yamaha YZ80. The information is clear and well-organized. The download process was seamless, and I received the link almost instantly after purchase. Highly recommend!
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I found this manual incredibly helpful for maintaining my YZ80. It covers all the necessary repairs and adjustments. Customer support was fantastic; I had a question about the download, and they responded quickly with helpful information. Overall, a great purchase!