1977-1982 Yamaha XS400 Service Manual
Technician-level documentation for the 1977-1982 Yamaha XS400, covering engine, chassis, electrical, and FI systems. Publication Part No. 41X-28197-00.
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Models Covered & Key Technical Specifications
Yamaha XS400 (41X-28197-00) - 1977-1982
Factory Repair Manual | Reference Kit.
- Design Specifications: Dimensional Limits: 0.10 mm establishes the minimum gap allowance for tappets in cold operation.
- Advanced Tuning Parameters: For optimal performance, 2.0-4.0mm defines the throttle cable play range.
- Calibrated Inspection Data: Documented Procedures: 12,000 km signifies the interval for spark plug replacement.
- Documented Maintenance Schedules: Prescribed Intervals: 6,000 km indicates the service interval for air filter inspection.
- Prescribed Operational Guidelines: Engineered Specifications: 1.1 kgf-m represents the torque for spark plugs.
- Engineered Performance Metrics: Calibrated Values: 100 N-m denotes the rear axle nut torque for E-03, 28, 33 models.
Professional Workshop Service Manual & Technical Specifications
Yamaha XS400 FI System Manual: Yamaha Official Service & Repair Manual - 1977-1982 Edition Manual-Nexus
Equipment-Series: FI System | Technical-Scope: FI System Logic | Equipment-Series: Motorcycle Mechanics.
TABLE OF CONTENTS
| Integrated-Framework | Diagnostic-Logic | Calibration-Data |
|---|---|---|
| Precautions in Servicing | FI System Technical Features | Crankshaft Position Sensor (CKP Sensor) |
| Connector/Coupler | Injection Time (Injection Volume) | Camshaft Position Sensor (CMP Sensor) |
| ECM/Various Sensors | Fuel Delivery System | Intake Air Temperature Sensor (IAT Sensor) |
| Self-Diagnosis Function | Fuel Pump Control System | Engine Coolant Temperature Sensor (ECT SENSOR) |
| TPS Adjustment | Sensors | Atmospheric Pressure Sensor (AP Sensor) |
TABLE OF CONTENTS SUMMARY
Outlining the operational framework across: Precautions in Servicing, FI System Technical Features, Connector/Coupler, ECM/Various Sensors, and Self-Diagnosis Function. This manual meticulously documents the intricacies of the motorcycle's fuel injection system. Calibration requirements are specified for sensor voltage ranges to ensure accurate readings. Electrical circuit inspection procedures are thoroughly detailed, utilizing specialized testers for diagnostic accuracy. Wear limits are specified for critical components, guiding timely replacement to maintain peak engine performance. Fuel injector specifications are provided, detailing operation and maintenance. The manual also covers essential troubleshooting steps for common FI system malfunctions, including specific error codes and their solutions. Torque specifications are included for critical fasteners related to the FI system, ensuring proper assembly and function.
This document details the fuel pump's operation, including its control system and potential issues. It provides comprehensive coverage of all sensors within the FI system, explaining their function, location, and testing procedures. Troubleshooting sections offer step-by-step guidance for diagnosing and resolving malfunctions indicated by the ECM, ensuring a smooth and reliable riding experience.
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