1977-1982 Yamaha GT80, GTMXE, GT80G, GT80J, DT80J, DT100D, DT100G, DT100J Service & Supplementary Manual

Full service and supplementary documentation for 1977-1982 Yamaha GT80, GTMXE, GT80G, GT80J, DT80J, DT100D, DT100G, and DT100J models. Publication LIT-11616-03-05.

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Document Details

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Document Number / Seller:
24680 / John Parker
File Size:
21.80 MB
File Type:
ZIP
Language:
Pages:
175
Printable:
Yes
Category:
Bike
Last updated / verified
Dec 24, 2025

Models Covered & Key Technical Specifications

Original Yamaha GT80, GTMXE, GT80G, GT80J, DT80J, DT100D, DT100G & DT100J Service & Supplementary Manual: PDF for Motorcycles (1977-1982) Documentation-Framework Model-Designation: GT80, GTMXE, GT80G, GT80J, DT80J, DT100D, DT100G, DT100J (LIT-11616-03-05) | Original Series Repository.

  • Approved Footprint Data: 1,565 mm establishes the overall length metric.
  • Functional Imaging Specs: For engine service, 72 cc defines the displacement parameter.
  • Verified Tightening Data: 1.0 m-kg signifies the engine mount nut torque value.
  • Designated Gap Specs: The spark plug gap requires 0.5 mm for optimal operation.
  • Essential Power Draw: For the battery, 6V 4AH defines the capacity standard.
  • Operational Component Weight: The basic weight of the GT80E is 64 kg.

Manual Description & Preview

Original Yamaha GT80, GTMXE, GT80G, GT80J, DT80J, DT100D, DT100G & DT100J Service & Supplementary Manual: PDF for Motorcycles (1977-1982) Documentation-Framework

Model-Designation: GT80, GTMXE, GT80G, GT80J, DT80J, DT100D, DT100G, DT100J (LIT-11616-03-05) | Original Series Repository.

Assessment-Element Value Logic
Publication Year 1977-1982 Historical Context Data
Document Type Service & Supplementary Manual Technical Classification
Primary Models GT80, DT100 Core Vehicle Coverage
Additional Models GTMXE, GT80G, GT80J, DT80J, DT100G, DT100J Extended Model Inclusion
Part Number LIT-11616-03-05 Reference Identifier

Maintenance hierarchies are structured into chapters covering general information, periodic inspections and adjustments, engine overhaul, carburetion, chassis, and electrical systems. The manual details procedures for disassembly, inspection, repair, and assembly of various motorcycle components. It also provides essential specifications and diagrams for troubleshooting and maintenance. The document includes torque specifications for various components to ensure proper structural misalignment prevention.

FAQ

What **designated** tools are required for adjustment procedures? keyboard_arrow_down

15 specialized tools are listed, including a flywheel holder (90890-01235) and a crankcase separating tool (90890-01135), necessary for various adjustment and disassembly procedures.

Identify the **critical** pressure specifications for the tires. keyboard_arrow_down

Tire pressures range from 1.0 kg/cm² (15 psi) for off-road conditions to 2.3 kg/cm² (32 psi) for on-road conditions, ensuring optimal handling and safety.

What **required** procedures are detailed for the engine overhaul sequence? keyboard_arrow_down

Engine overhaul procedures include complete disassembly of the engine, inspection and repair of components like the cylinder head, piston, and crankshaft, followed by detailed reassembly instructions.

Determine the **specified** service interval parameters for regular maintenance. keyboard_arrow_down

Service intervals are specified in kilometers and months, with initial break-in checks recommended every 1,000 km (600 mi) or 1 month, and subsequent checks every 3,000 km (2,000 mi) or 6 months.

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