1984 Yamaha IT490(L) / IT250(L) Owner's Service Manual

Technical reference for the 1984 Yamaha IT490(L) and IT250(L) motorcycles. Documents maintenance, troubleshooting, and specifications. PN 29V-28199-70.

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Document Details

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Document Number / Seller:
24571 / Richard Young
File Size:
13.58 MB
File Type:
ZIP
Language:
English, French
Printable:
Yes
Category:
Bike
Last updated / verified
Apr 27, 2025

Models Covered & Key Technical Specifications

Yamaha IT490(L) / IT250(L) (29V-28199-70) -- 1984 Operational Collection | Series Set.

  • Authorized Scan Resolution: 0.7-0.8 mm establishes the gap for the IT490 spark plug Baseline.
  • Critical Tightening Data: For proper assembly, 20 Nm signifies the torque for the spark plug Specification.
  • Operational Electrical Specs: The ignition timing is set to 2.0 mm before Top Dead Center Mapping.
  • Fundamental Thermal Rating: The engine's displacement of 487 cc defines the operational capacity Framework.
  • Specific Storage Capacity: The fuel tank capacity of 13.5 L ensures sufficient range Parameters.
  • Maximum Ventilation Data: 2.190 mm overall length provides ample space for operation Baseline.

Professional Workshop Service Manual & Technical Specifications

In-Depth Training Wiring Manual: Yamaha IT490(L) / IT250(L) for hassle-free repairs OEM-Documentation

Reference-Category: Bike / Coverage-Scope: Engine, Chassis, Electrical / Reference-Category: Procedures.

Assessment-Element Operational-Logic Framework
General Information Covers basic features and controls. Included
Maintenance and Adjustments Details routine checks and adjustments. Included
Engine Maintenance and Repair Documents engine disassembly and reassembly. Included
Chassis Maintenance and Repair Outlines procedures for wheels, forks, and suspension. Included
Electrical Troubleshooting Provides guidance for diagnosing electrical issues. Included

Coverage is segmented into sections for General Information, Regular Maintenance and Adjustments, Engine Maintenance and Repair, Chassis Maintenance and Repair, Electrical Troubleshooting, and Appendices. This manual details procedures for disassembly, inspection, and assembly of various engine components, including the carburetor, cylinder head, and clutch. It also covers chassis-related maintenance for wheels, forks, and the rear shock absorber. Furthermore, it offers troubleshooting steps for electrical systems and provides comprehensive specifications for the IT490(L) and IT250(L) models. The document also documents torque specifications for critical fasteners to ensure proper assembly and function, preventing fastener fatigue prevention.

FAQ

Reference the **specified** tool requirements. keyboard_arrow_down

10 Nm is the torque value for the steering ring nut to ensure proper assembly.

What are the **essential** electrical values? keyboard_arrow_down

The ignition timing is specified as 2.0 ± 0.1 mm for the IT490(L) model.

Specify the **correct** calibration settings. keyboard_arrow_down

The spark plug gap for the IT250(L) is 0.5-0.6 mm, which is crucial for proper combustion.

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Reviews (2)

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New
This service manual is incredibly detailed and covers everything you need for maintenance and repairs. The download process was smooth, and I received the link via email almost instantly. Highly recommend!
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New
The manual is comprehensive and very helpful for keeping my Yamaha in top shape. Customer support was quick to respond to my questions, making the experience even better!