1975-1977 Yamaha XS250, XS360, XS400 Twins Workshop Manual

For XS250, XS360, & XS400 Twins: diagnostics, service, and parts for these classic motorcycles. Ref: C8049A

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Document Details

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Document Number / Seller:
30343 / Elizabeth Smith
File Size:
22.48 MB
File Type:
PDF
Language:
English
Printable:
Yes
Category:
Motorcycle
Last updated / verified
Aug 23, 2025

Models Covered & Key Technical Specifications

Yamaha XS250, XS360, XS400 Twins (n/a) - 1975-1977

A Digital Index Reference Toolkit | Classic Twins Manual.

  • Verified Scan Resolution: 1200 dpi establishes the maximum print output Architecture.
  • Engineered Tightening Data: For optimal operation, 15-30C defines the environmental limit Framework.
  • Prescribed Storage Capacity: 450 W -- signifies the active printing consumption Threshold.
  • Nominal Electrical Specs: The formatter board requires 64 MB for standard operation Logic.
  • Defined Thermal Rating: Maximum throughput reaches 25 ppm Parameters.
  • General Addressable Resolution: The formatter board requires 64 MB for standard operation Logic.

Professional Workshop Service Manual & Technical Specifications

Functional Engineering Service Manual: Yamaha XS250, XS360, XS400 Twins Manual - Comprehensive Service Guide for Classic Twins (1975-1977) Operations-Manual

Year-Coverage: 1975-1977 // System-Identifier: Motorcycle / Engine Logic // Year-Coverage: Technical Details.

Component Rating Framework
Engine 248 cc (15.13 cu in) 248 cc (15.13 cu in)
Carburettor Mikuni Mikuni
Spark Plug NGK BP-7ES NGK BP-7ES
Battery 12N7-3B-1 F-8 or Yuasa

Providing a structural breakdown of the following chapters:

  • Engine, Clutch, and Gearbox
  • Fuel System and Lubrication
  • Ignition System
  • Frame and Forks
  • Wheels, Brakes, and Tyres

This manual documents the repair and maintenance procedures for the Yamaha XS250, XS360, and XS400 twin motorcycles. It covers a wide range of systems, including engine, clutch, gearbox, fuel system, lubrication, ignition, frame, forks, wheels, brakes, and tires. The manual provides detailed instructions for disassembly, inspection, repair, and reassembly of various components. It also includes diagnostic information and specifications to aid in troubleshooting and maintenance. The documentation addresses wear limits are specified for various components, and system operation descriptions are provided to help understand the functionality of each system. Information is presented with clear diagrams and illustrations to assist the user in understanding the procedures. This manual documents torque specifications for various components to ensure proper joint separation prevention.

Suspension service documentation covers

the removal and replacement of front and rear suspension components, including forks, rear shocks, and related linkages. It details inspection procedures for wear and damage, as well as the correct methods for disassembly and reassembly to ensure proper suspension function and safety.

Disassembly instructions are documented for

various engine and gearbox sub-assemblies. This includes detailed steps for removing and reassembling the crankshaft, pistons, cylinder head, valves, clutch, and transmission gears. The manual emphasizes the importance of cleanliness and precision during these procedures to ensure the longevity and proper operation of the engine and gearbox.

Wear limits are specified for

components such as brake pads, clutch plates, and engine bearings. These specifications are crucial for determining when parts need replacement to maintain optimal performance and prevent premature failure. The manual provides measurements and criteria for assessing component wear.

System operation descriptions cover

the functionality of the electrical system, including the charging system, ignition system, and lighting. It explains how these systems work and provides guidance on diagnosing common electrical faults. Understanding system operation is key to effective troubleshooting and repair.

The documentation addresses

the detailed procedures for maintenance and repair of the wheels, brakes, and tires. This includes wheel balancing, brake pad replacement, brake bleeding, and tire changing. Ensuring these systems are in good working order is critical for rider safety and vehicle performance.

FAQ

What does the **exact** assembly sequence for the primary drive gears involve? keyboard_arrow_down

2.0-2.4 kg m (14.5-17.4 ft-lb) and 0.8-1.2 kg m (5.8-8.7 ft-lb) are the specified torque values for the primary drive gears, ensuring proper seating and preventing damage during assembly.

Reference the **specific** service interval parameters for routine maintenance. keyboard_arrow_down

Weekly or every 200 miles (300 km) for routine maintenance tasks, and every six months or 4000 miles (6400 km) for more in-depth checks, are the recommended service intervals for optimal performance.

What are the **designated** system architecture specifications for the ignition coils? keyboard_arrow_down

Primary winding resistance is 0.98 ohms at 20°C (68°F), and secondary resistance is 8.0 K ohms ± 10% at 20°C (68°F), defining the electrical parameters for proper ignition coil function.

Customer Reviews

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Reviews (5)

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Rated 4 out of 5 stars
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I appreciate the step-by-step approach in this manual. It’s been a lifesaver for my XS360!
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The download process was smooth, and the manual is incredibly detailed. Highly recommend it for anyone with an XS model!
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This manual has everything I needed to service my XS250. The clear diagrams and instructions made the process so much easier!
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I received a quick response when I had questions. The manual covers everything I need for my XS400!