2004 Yamaha YZ450F(S) Service Manual

Technician-level documentation for the Yamaha YZ450F(S) motocross bike. Covers all maintenance, disassembly, and repair procedures for optimal performance and longevity. Part Number: 5XD-28199-80.

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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: 2004 Yamaha YZ450F(S)
Sub-models / Variants: 5XD1 (USA), 5XD2 (EUROPE), 5XD4 (CDN, AUS, NZ, ZA)
Trade Names: YZ450F
Build Years: 2004
Serial Numbers: 5XD-28199-80
Technical Data:

  • Engine: Liquid cooled 4-stroke, DOHC, single cylinder, forward inclined
  • Displacement: 449 cm3
  • Bore × Stroke: 95.0 × 63.4 mm
  • Compression Ratio: 12.5:1
  • Transmission: 4-speed, constant mesh, gear primary reduction
  • Dry Weight: 100.0 kg
  • Fuel Tank Capacity: 7.0 L
  • Engine Oil Capacity: 1.0 L (periodic change), 1.1 L (with filter change), 1.2 L (total)
  • Coolant Capacity: 1.2 L
  • Ignition System: CDI magneto
Technical Specifications
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Document Number / Seller:
31181 / Peter Grant
File Size:
20.32 MB
File Type:
PDF
Language:
English
Pages:
300
Printable:
Yes
Category:
Bike
Last updated / verified
Apr 4, 2025

Yamaha Manual Features & Content Preview

2004 Yamaha YZ450F(S) Technical Documentation

  • Covers 2004 Yamaha YZ450F(S) motocross motorcycles, including USA, Europe, Canada, Australia, New Zealand, and South African variants
  • Official Yamaha publication P/N 5XD-28199-80, original 2004 edition
  • Contains 300 pages of factory-level service procedures, technical specifications, and exploded-view diagrams
  • Cross-reference lookup works via the built-in search
  • Laid out for standard letter and A4 printing
  • This official 300-page service manual is the exact factory documentation for the 2004 Yamaha YZ450F(S) motocross series, documenting engine, chassis, and electrical systems for the 5XD-series build.

Contents Summary

The 2004 Yamaha YZ450F(S) service manual follows a logical sequence, beginning with essential general information and machine identification markers. It transitions through exhaustive maintenance specifications, offering detailed tables for torque values, fluid capacities, and electrical reference checks. Subsequent sections detail the internal engine architecture, including valve clearance settings, cam dimensions, and piston tolerances. The manual concludes by covering chassis maintenance and high-performance tuning, ensuring all critical mechanical adjustments are managed according to factory standards.

Specification Previews

Technical data is provided for precision setup. Cylinder head warp limits are specified at 0.05 mm, and the 449 cm3 engine requires 1.2 L of total oil for optimal lubrication. Valve clearance for the intake is listed at 0.10–0.15 mm in the valve specification table. Coolant system capacity for the 2004 Yamaha YZ450F(S) is documented at 1.2 liters. Electrical system pickup coil resistance is specified at 248–372 ohms in the maintenance data section. Reference what factory workshop documentation is structured to see how this technical information is organized for professional mechanics and competition riders.

Reference only — always consult a certified technician before performing service on this equipment.

An official 300-page Yamaha OEM workshop manual covering the 2004 Yamaha YZ450F(S), documenting engine, chassis, electrical, and fuel-injection specifications for the 5XD-series build.

Manual FAQ, Purchase & Download Details

Which specific electrical sections include wiring diagram references for the 2004 YZ450F? keyboard_arrow_down

Chapter 6 contains the electrical system section which lists the wiring diagram, electrical components, and throttle position sensor information.

Are there specific document revision markers or publication numbers provided in this PDF? keyboard_arrow_down

Cover page and manual footer indicate the publication number 5XD-28199-80. This reference code helps identify the specific edition of the owner service manual.

Is the 2004 Yamaha YZ450F(S) model covered in this manual? keyboard_arrow_down

Manual is specifically designated for the 2004 Yamaha YZ450F(S) model as indicated on the title page and publication reference.

What kind of reference tables and technical data summaries are located in the specifications chapter? keyboard_arrow_down

Chapter 2 lists general technical data including maintenance specifications and definition of units. These tables provide a central location for checking standard engine and chassis parameters.

Does this manual include exploded views for major system components? keyboard_arrow_down

Manual contains exploded diagrams at the beginning of each disassembly section to assist with part identification. These illustrations visually detail the order and layout of components for the engine, chassis, and other systems. The job instruction charts accompanying these diagrams provide additional context for the parts shown.

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