1981 Yamaha DT50, DT80, DT50MX, DT80MX Service Manual

Wiring diagrams, specifications, and repair sequences for DT50, DT80, DT50MX, DT80MX: engine, transmission, suspension, electrical systems. Part number for this manual is 100245.

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Document Details

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Document Number / Seller:
24676 / Amy Scott
File Size:
12.98 MB
File Type:
ZIP
Language:
English, German
Printable:
Yes
Estimated Download Time:
0.27 Minutes
Delivery Format:
Digital (PDF) - Instant Access
Category:
Bike
Brand:
Yamaha
Reviewed and Approved:
Aug 29, 2025
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Models Covered & Key Technical Specifications

Factory-Level Diagnostic Field Manual: Bike Yamaha manual (1981) for DT50, DT80, DT50MX, DT80MX models Maintenance-Registry

Yamaha DT50MX/DT80MX (100245) -- 1981 Documentary Reference Handbook | File.

  • Reference Gross Dimensions: 2,075 mm establishes the overall length Architecture.
  • Integral Optical Resolution: For optimal operation, 82 kg defines the net weight Framework.
  • General Moment Values: 49 cm³ -- signifies the cylinder displacement Threshold.
  • Certified Fit Tolerances: The gearbox requires 5-speed for standard operation Logic.
  • Factory Climate Specs: Maximum throughput reaches 132 mm Parameters.
  • Established Shipping Weight: The engine oil capacity is 1.0 qt. Requirements.

Professional Workshop Service Manual & Technical Specifications

Factory-Level Diagnostic Field Manual: Bike Yamaha manual (1981) for DT50, DT80, DT50MX, DT80MX models Maintenance-Registry

Operational-Framework: DT50, DT80, DT50MX, DT80MX / Yamaha Motor Corporation, Ltd. Logic // Component-Focus: Bike / Motorcycle Logic // Operational-Framework: Maintenance and Repair Procedures.

Document Overview Table

Integrated-Framework Operational-Logic Calibration-Spec
Engine Systems Complete overhaul procedures Emission Controls
Transmission Gearbox component diagrams Drivetrain Maintenance
Electrical Wiring schematics Ignition System Diagrams
Chassis Frame and suspension details Braking System Specs
Fuel System Carburetor tuning Fuel Delivery Diagrams

Cataloging major assemblies into detailed sections, this manual provides an in-depth look at the Yamaha DT50, DT80, DT50MX, and DT80MX models. Practical information covers a wide array of systems and procedures.

Assembly instructions are detailed for the engine, including piston and cylinder service.

Hydraulic schematics are included for the suspension system.

Steering component information is provided for handlebar and fork assembly.

Inspection guidelines are provided for the braking system and wheels.

Alignment specifications are included for the drive chain and sprockets.

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

FAQ

Check the **standard** component identification keyboard_arrow_down

1.1 mm is the maximum allowable wear limit for the brake shoe lining.

What does the **necessary** adjustment procedures keyboard_arrow_down

30 Nm (3.0 m-kg) is the tightening torque for the clutch boss.

Reference the **recommended** pressure specifications keyboard_arrow_down

1.5 bar (21 psi) is the recommended front tire pressure for the DT50MX and DT80MX models.

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Reviews (2)

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New
Great manual! It covers everything you need for servicing. The support team was very responsive to my questions, which made the experience even better. Definitely worth the purchase!
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New
This service manual is a must-have for anyone with a Yamaha DT50 or DT80. The download process was smooth, and I received the link almost instantly! Highly recommended!