1976-1979 Yamaha RD250, RD400 Supplementary Service Manual
For Yamaha RD250 & RD400: diagnostics, service, and parts for 1976-1979 models. Publication 2R8-28197-80.
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Models Covered & Key Technical Specifications
Operational Training Factory Manual: Motorcycle Yamaha RD250, RD400 supplementary repair manual, covers 1976-79 Chassis-Documentation Engine-Type: RD250, RD400 (2R8-28197-80) | Model-Portfolio: Yamaha Motor Corporation, Ltd. Package
- Factory Play Limits: 28° establishes the operating range for minimum turning radius.
- Essential Electrical Specs: For optimal operation, 2,000 r/min defines the engine speed for checking the generated voltage.
- Key Climate Specs: 60 km/h indicates the maximum speed at which braking distance is within specifications.
- Primary Spacing Data: The fuel tank capacity requires 1.6 lit (1.7 US qt) for proper operation.
- General Travel Rate: A 30-40 mm range defines the chain free play for optimal performance.
- Approved Print Quality: The minimum turning radius of 2,300 mm allows for agile maneuverability.
Manual Description & Preview
Operational Training Factory Manual: Motorcycle Yamaha RD250, RD400 supplementary repair manual, covers 1976-79 Chassis-Documentation
Engine-Type: RD250, RD400 (2R8-28197-80) // Model-Portfolio: Yamaha Motor Corporation, Ltd. / Motorcycle Logic // Engine-Type: Covers 1976-79 models, including essential technical details.
| Performance-Element | System-Path | Logic |
|---|---|---|
| Operation Overview | Engine & Chassis | Documenting standard procedures |
| Model Variants | RD250, RD400 | Specific to each motorcycle |
| Publication Details | Service Manual | Including part numbers and revisions |
| Reference Data | Specifications | For accurate repair and maintenance |
Repair data is categorized into the following sections: Engine Overhauling, Carburetion, Chassis, Electrical, and Appendices. These sections detail repair procedures, component identification, and technical specifications necessary for maintaining the Yamaha RD250 and RD400 motorcycles. Wiring diagrams are provided for clear electrical system understanding. Fuel system procedures are documented, guiding through adjustments and maintenance. Adjustment procedures are detailed for various components to ensure optimal performance. Timing procedures are documented, crucial for engine efficiency. Technical notes are provided for specific situations and warnings. The manual also documents torque specifications for engine components to ensure proper bolt stretch prevention and assembly integrity.
Engine System Documentation
The manual thoroughly documents the engine systems of the Yamaha RD250 and RD400. This includes disassembly and assembly procedures for the engine, carburetor, and related components. Detailed instructions cover cylinder head, piston, crankshaft, and clutch assemblies, ensuring a complete overhaul process.
Chassis and Electrical Systems
This section covers the chassis components, including brakes, wheels, and suspension systems. Additionally, the electrical system is thoroughly documented, providing clear diagrams and troubleshooting guidance for ignition, charging, and lighting systems. Important maintenance intervals for lubrication and periodic inspections are also included.
Troubleshooting and Component Specifications
The manual provides guidance on troubleshooting common issues and includes detailed specifications for all major components. This ensures that repairs are performed correctly and efficiently, maintaining the motorcycle's performance and longevity.
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