2009 Yamaha YZ450FY Service Manual

This manual details the maintenance and repair procedures for the 2009 Yamaha YZ450FY. It covers operation, inspection, and tuning with clear instructions and diagrams. PN LIT-11626-22-57

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Document Details

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Document Number / Seller:
27782 / Carol Parker
File Size:
12.86 MB
File Type:
PDF
Language:
English
Pages:
276
Printable:
Yes
Category:
Motorbike
Last updated / verified
Feb 3, 2026

Models Covered & Key Technical Specifications

Yamaha YZ450FY (LIT-11626-22-57) - 2009 Repair and Maintenance Manual | Owner's Service Manual Set

  • Authorized Fastening Values: 30 Nm (3.0 m•kg, 22 ft•lb) for cylinder head bolts ensures proper torque specifications are met.
  • Published Lubrication Data: Yamalube 4, SAE10W-40 or SAE20W-50 is recommended for optimal lubrication framework.
  • Reference Threaded Fastener Data: 10 Nm (1.0 m•kg, 7.2 ft•lb) for oil filter element cover establishes crucial tightening torque parameters.
  • Fundamental System Fill: 0.99 L (0.87 Imp qt, 1.05 US qt) of coolant capacity is specified for efficient cooling system operation logic.
  • Specific Power Framework: Kick starter crank torque of 33 Nm (3.3 m•kg, 24 ft•lb) defines the critical rotational force requirements.
  • Core Output Density: Brake disc bolt torque of 12 Nm (1.2 m•kg, 8.7 ft•lb) ensures proper wheel assembly configuration.

Manual Description & Preview

Definitive Calibration Manual: Yamaha YZ450FY (2009 Edition) - Owner's Service Manual

Engineering-Base: YZ450FY // Model-Specs: 449 cm3 / Liquid Cooled // Technical-Scope: Motorcycle Performance Data

Repair data is categorized into:

  • GENERAL INFORMATION (Page 1-17)
  • SPECIFICATIONS (Page 2-1 to 2-19)
  • REGULAR INSPECTION AND ADJUSTMENTS (Page 3-1 to 3-36)
  • ENGINE (Page 4-2 to 4-43)
  • CHASSIS (Page 5-2 to 5-9)
  • ELECTRICAL (Page 6-2 to 6-8)
  • TUNING (Page 7-1 to 7-8)

This owner's service manual is a comprehensive guide for the Yamaha YZ450FY, detailing all aspects of its maintenance and repair. It includes essential information on general specifications, engine and chassis systems, electrical components, and tuning procedures. The manual is organized into clear sections, making it easy to find the information needed for servicing.

This manual documents torque specifications for engine and chassis components to ensure proper mating surface contact.

FAQ

Determine the **specific** torque for the front brake caliper? keyboard_arrow_down

28 Nm (2.8 m•kg, 20 ft•lb) is the specified torque for the front brake caliper to fork bolts.

What **designated** safety precautions are in place for radiator cap removal? keyboard_arrow_down

Never remove the radiator cap when the engine is hot; wait until it cools to prevent injury from scalding fluid and steam.

Check the **critical** lubrication requirements for the kick starter assembly. keyboard_arrow_down

Apply molybdenum disulfide oil on the inner circumferences of the kick gear and ratchet wheel for proper lubrication.

What does the **required** valve clearance mean for engine performance? keyboard_arrow_down

Intake valve clearance should be 0.10–0.15 mm (0.0039–0.0059 in) and exhaust valve clearance 0.20–0.25 mm (0.0079–0.0098 in) to ensure optimal engine performance and prevent damage.

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