2009 Yamaha YZ450F(Y) Owner's Service Manual

Comprehensive YZ450F(Y) service and repair reference covering adjustments, engine, chassis, electrical, and tuning procedures. Part Number: 34P-28199-80-E0.

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Technical Safety Notice
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This official OEM document is intended for professional technicians and skilled operators. Performing service on mechanical equipment involves inherent risks. By purchasing, you acknowledge that RepairLoader provides original manufacturer data for informational purposes. Always prioritize safety: use correct tools, wear protective gear, and consult a certified professional if you are uncertain of any procedure.

Yamaha Models Covered & Key Technical Specifications

Models: 2009 Yamaha YZ450F(Y)
Sub-models / Variants: USA, CDN, AUS, NZ, ZA, EUROPE
Trade Names: YZ450F
Build Years: 2009
Serial Numbers: 34P1 (USA, CDN), 34P2 (EUROPE), 34P4 (AUS, NZ, ZA)
Technical Data:

  • Engine displacement: 449 cm3
  • Engine type: Liquid cooled 4-stroke, DOHC
  • Cylinder arrangement: Single cylinder, forward inclined
  • Transmission type: Constant mesh, 5-speed
  • Fuel system: FCR-MX39 carburetor
  • Drive system: Chain drive
  • Spark plug: CR8E/NGK
  • Starting system: Kickstarter
Technical Specifications
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Document Number / Seller:
26129 / Jennifer Cooper
File Size:
12.38 MB
File Type:
PDF
Language:
English
Pages:
187
Printable:
Yes
Category:
Motorcycle
Last updated / verified
Mar 1, 2025

Yamaha Manual Features & Content Preview

2009 Yamaha YZ450F(Y) Owner's Service Manual Content

  • Covers 2009 Yamaha YZ450F(Y) motocross racing machines, including all regional variants for North America, Europe, Australia, New Zealand, and South Africa
  • Official Yamaha publication P/N 34P-28199-80-E0, first edition May 2008
  • Contains 12 detailed exploded-view diagrams and 35 technical specifications tables for engine and chassis maintenance
  • Accessible from your device as soon as the order is placed
  • OCR text layer lets you jump to a torque spec by keyword
  • Stored against your account so you can retrieve it after a hard-drive loss
  • This 2009 first edition manual is the official reference used for the 34P-series build, providing the factory maintenance procedures and torque values required for competition setup

Structural Scope and Maintenance Walkthrough

The 2009 Yamaha YZ450F(Y) owner's service manual provides comprehensive documentation organized across seven core sections. Initial chapters outline vehicle identification, machine parts, and preparation procedures for disassembly, including cleaning and storage protocols for race-season maintenance. The engine section details servicing for the cylinder head, camshafts, valves, carburetor, and transmission, accompanied by technical charts for engine assembly and adjustment. Chassis coverage spans the front and rear suspension, brake systems, drive chain maintenance, and steering head adjustments.

Technical Preview and Specification Highlights

This manual provides complete service data, including fluid capacities and critical fastener torque settings for the YZ450F(Y) platform. Coolant capacity for the cooling system is documented at 0.99 liters. Valve clearance for the intake is listed at 0.10–0.15 mm in the cylinder head specification table. Cylinder head bolt torque values are documented in a multi-stage sequence, with final-stage angles of 180° specified in the engine assembly data. For more information on how factory workshop documentation is structured, visit what an OEM service publication covers. An official 187-page Yamaha OEM owner's service manual covering the 2009 YZ450F(Y), documenting engine, chassis, electrical, and carburetor specifications for the 34P-series build.

Manual FAQ, Purchase & Download Details

Are wiring diagram references, electrical component layouts, and connector schematics included in the electrical chapters of this manual? keyboard_arrow_down

Document contains a dedicated electrical section, specifically Chapter 6, which lists electrical components and provides wiring diagram references.

Does the document contain the full 187-page service content intended for the 2009 Yamaha YZ450F series? keyboard_arrow_down

Provided service manual is a complete edition containing 187 pages of technical information.

Can I find technical reference information for the ignition system, sensor system, or switchgear in this document? keyboard_arrow_down

Chapter 6 covers the ignition system and the throttle position sensor system. These sections provide technical reference material related to electrical system components. The manual also includes general information on control functions for various switches located on the handlebars.

Is this manual identified as the 1st Edition for the 2009 model year? keyboard_arrow_down

Document is officially identified as the 1st Edition, published in May 2008.

What fluid capacity and lubricant specification tables are listed for the engine and cooling systems? keyboard_arrow_down

Specification tables in Chapter 2 list engine oil capacities for periodic changes and oil filter replacements. The same section also contains coolant capacity data and recommendations for oil grades based on regional standards.

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