1978-1982 Yamaha IT250 / IT465H Owner's Service Manual

Full service documentation for the 1978-1982 Yamaha IT250 and IT465H models, covering all mechanical and electrical systems. Ref: 29V-28199-70, 51.4-23199-20

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Document Details

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Document Number / Seller:
24570 / Sharon White
File Size:
15.83 MB
File Type:
ZIP
Language:
English
Printable:
Yes
Category:
Motorbike
Last updated / verified
Dec 7, 2025

Models Covered & Key Technical Specifications

Yamaha IT250 / IT465H (29V-28199-70 / 51.4-23199-20) Manual: 1978-1982

Consolidated Guide Library | Series Dossier. Prescribed Thermal Rating: 90°C – 120°C (194° – 248°F) establishes the maximum operational temperature Range. Standard Feed Speed: Always maintain the correct tire pressure: 200 mm (7.9 in) defines the optimal tire circumference Norms. Maximum Footprint Data: 30 Nm (3.0 kg·m, 22 ft·lb) -- signifies the recommended torque for the rear sprocket installation Bounds. System Securement Values: The machine must be stored for 60 days or more requires some preventive procedures to ensure against deterioration Topology. Calibrated Clearance Data: 0.008 in (0.20 mm) represents the maximum allowable piston ring gap Matrix. Nominal Climate Parameters: Not recommended to operate in extreme cold; refer to the manual for specific climate operation Standards.

Professional Workshop Service Manual & Technical Specifications

Yamaha IT250 / IT465H Owner's Service Manual: 1978-1982 Models Troubleshooting-Index

Model-Portfolio: IT250 / IT465H // Validation-Data: Bike / Motorcycle Logic // Model-Portfolio: 1978-1982.

Performance-Element System-Path Framework
Engine Type 2-stroke, gasoline, torque induction Air Cooled
Displacement 246 cm³ (15.0 cu in) 465 cm³ (28.37 cu in)
Starter System Primary kick Kick starter
Oil Grade Yamalube "R", Castrol R30 / A545 Yamalube 4-stroke oil / SAE 10W/30 "SE" motor oil

Technical chapters are organized around:

  • GENERAL INFORMATION
  • REGULAR MAINTENANCE AND ADJUSTMENTS
  • ENGINE MAINTENANCE AND REPAIR
  • CHASSIS MAINTENANCE AND REPAIR
  • ELECTRICAL TROUBLESHOOTING

Reliably requiring adherence to specifications, this manual documents procedures for maintenance, disassembly, assembly, and repair of the Yamaha IT250 and IT465H models. It includes detailed diagrams, troubleshooting guides, and specifications to ensure proper function. Careful attention to detail ensures longevity and optimal performance of your machine.

This manual documents torque specifications for critical engine and chassis components to ensure proper axial load stability.

FAQ

What **necessary** procedures are there for engine electrical values? keyboard_arrow_down

10 Nm (1.0 kg·m, 7.2 ft-lb) is the torque specification for the clutch retaining bolt, ensuring proper clutch assembly. Additionally, consult pages 85+ for detailed ignition system troubleshooting.

Determine the **recommended** calibration settings for the fuel system. keyboard_arrow_down

A fuel tank capacity of 13 L (2.86 IMP gal) is specified. For carburetor adjustments, refer to pages 17-20 for detailed float height and jet settings.

What **calibrated** specifications exist for clearance measurements? keyboard_arrow_down

Piston ring gap specifications range from 0.004 – 0.020 in (0.070 – 0.075 mm). For extensive specifications, review pages 63-68 which include detailed measurements for various engine and chassis components.

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Reviews (3)

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This manual is a game changer for maintaining my Yamaha IT250. The download process was seamless, and I received the link in no time. Highly recommend!
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I had a question about the manual and their support responded quickly. The download was smooth and I appreciate the detailed sections on maintenance!
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Rated 4 out of 5 stars