2009 Yamaha YZ250Y Owner's Service Manual

YZ250Y service documentation with detailed coverage of engine, chassis, and electrical systems. PN LIT-11626-22-55.

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Document Details

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Document Number / Seller:
27781 / Mary Brown
File Size:
9.52 MB
File Type:
PDF
Language:
English
Pages:
244
Printable:
Yes
Category:
Motorcycle
Last updated / verified
Feb 4, 2025

Models Covered & Key Technical Specifications

2009 Yamaha YZ250Y (LIT-11626-22-55) -- Owner's Service Manual Yamaha YZ250Y (2009) | Series Yamaha Motorcycle Volume

  • System Circuit Specs: 0.18 mm (0.007 in) defines the ignition timing specification Framework.
  • Core Heat Tolerance: For optimal operation, 21.0 cm3 signifies the engine's combustion chamber capacity Benchmarks.
  • Specific Processing Speed: The transmission utilizes constant mesh, 5-speed operation Sequences.
  • Critical Resolution Data: 80/100-21 51M establishes the front tire size Mapping.
  • Universal Twist Specifications: The 26.9 ° caster angle dictates the steering geometry Configuration.
  • Technical Power Framework: 100 kPa (1.0 kgf/cm2, 15 psi) signifies the tire pressure Baseline.

Professional Workshop Service Manual & Technical Specifications

Applied Operations Training Manual: Yamaha YZ250Y (2009) Owner's Service Manual Electrical-Reference

Coverage-Scope: All chapters // Architecture-Focus: Motorcycle / Engine Logic // System-Coverage: Complete procedures. The service manual covers all aspects of the Yamaha YZ250Y, providing comprehensive guidance for maintenance and repair. It details systems, procedures, and specifications necessary for optimal performance and longevity.

Engine

This section details engine procedures, including coolant checks, oil changes, and component inspections. It provides specific instructions for tasks like carburetor adjustments and air filter maintenance.

Chassis

This part of the manual focuses on chassis components, covering wheel and brake system servicing, suspension adjustments, and steering head maintenance.

Electrical

The electrical section outlines the motorcycle's wiring diagrams, ignition system, CDI unit, and spark plug checks. It ensures proper functioning of all electronic components.

Specifications

This section provides detailed specifications for the Yamaha YZ250Y, including engine dimensions, transmission gear ratios, and brake system details, crucial for accurate servicing.

Torque Specifications Table

Metric Operational-Logic Validation-Data
Engine Assembly Torque 59.95–60.00 mm 2.360–2.362 in
Chassis Torque 115 mm 4.53 in
Brake Torque 250 × 3.0 mm 9.84 × 0.12 in
Electrical Torque 0.18 mm 0.007 in
Handlebar Torque 28 Nm 2.8 m•kg
Suspension Torque 131.5 mm 5.18 in

Effectively establishing proper maintenance schedules is vital for the longevity and performance of your Yamaha YZ250Y. The manual documents torque specifications for critical engine components to ensure proper joint separation prevention.

FAQ

Reference the **specified** tool requirements for spark plug removal. keyboard_arrow_down

1 Nm (0.1 m•kg, 0.7 ft•lb) is the specified torque for the throttle cable cap, often used in conjunction with spark plug maintenance procedures.

What are the **essential** electrical values for the ignition coil? keyboard_arrow_down

9.5–14.3 kΩ at 20 °C (68 °F) is the essential secondary winding resistance for the ignition coil.

Specify the **correct** calibration settings for the carburetor. keyboard_arrow_down

1 turn out is the correct pilot air screw setting for the carburetor, with some models requiring 2-1/4 turns out for reference only.

What is the **documented** clearance measurements for the piston ring end gap? keyboard_arrow_down

0.40–0.55 mm (0.016–0.022 in) is the documented standard end gap for the installed piston ring; the limit is 0.95 mm (0.037 in).

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Reviews (3)

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New
The manual is incredibly detailed and easy to follow. Downloading it was a breeze—received the link in my email almost immediately! Highly recommend for both new and experienced riders.
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New
This service manual provides all the info you need to keep your bike in top shape. The troubleshooting section is particularly helpful! Customer support was responsive when I had a question about the download process, which was smooth and professional.
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Rated 4 out of 5 stars