2005-2006 Yamaha WR450F(T) Service Manual

Complete maintenance and repair guide for the WR450F and WR450F(T) motorcycles. Covers engine, chassis, electrical system, and periodic service intervals with precise specifications and torque settings.

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Document Details

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Document Number / Seller:
24393 / Charles Rogers
File Size:
17.28 MB
File Type:
PDF
Language:
English, Italian, French, German, Spanish
Printable:
Yes
Category:
Motorcycle
Last updated / verified
Jul 7, 2025

Models Covered & Key Technical Specifications

Yamaha WR450F(T) — 2005–2006 Mechanical Technical Reference | WR450F Series Repository.

  • Nominal Displacement Data: 449 cm³ (15.8 Imp oz, 15.2 US oz) is specified as the engine cylinder volume Architecture.
  • Calibrated Bore Specification: 95.0 × 63.4 mm (3.74 × 2.50 in) indicates the piston stroke and bore diameter Threshold.
  • Rated Compression Ratio: 12.3:1 — establishes the cylinder pressure chamber efficiency Mapping.
  • Primary Fuel Capacity: 8.0 L (1.76 Imp gal, 2.11 US gal) is designed for primary fuel storage Configuration.
  • Documented Reserve Supply: The reserve fuel capacity measures 1.1 L (0.24 Imp gal, 0.29 US gal) Benchmarks.
  • Design Dry Weight: Machine mass reaches 112.5 kg (248 lb) without oil and fuel Range.

Professional Workshop Service Manual & Technical Specifications

In-Depth Parts Manual: Yamaha WR450F(T) Troubleshooting-Index

Reference-Category: WR450F, WR450F(T) 2005-2006 // Assembly-Group: Engine, Transmission, Chassis / Electrical Systems Logic // Reference-Category: Complete Service and Maintenance Documentation

System Components Documentation
Engine Assembly Cylinder, Piston, Crankshaft, Clutch, Transmission Comprehensive specifications and procedures included
Chassis Assembly Suspension, Braking, Frame, Steering, Wheels Complete technical data provided
Control Systems Ignition, Electrical, Charging, Starting Full system schematics documented

Coverage is segmented into General Information chapters documenting control functions and machine identification, Technical Specifications providing maintenance parameters for engine and chassis systems, Regular Inspection procedures addressing engine valve adjustment and brake system maintenance, Engine chapters covering fuel system and carburetor assembly, Chassis chapters detailing front fork and rear suspension components, Electrical chapters explaining ignition timing and charging systems, and Tuning chapters addressing performance optimization throughout the motorcycle. Each section includes detailed maintenance intervals with specifications for fluid capacities, torque requirements, and service schedules.

Operational Threshold

Repair information is provided for engine systems requiring periodic inspection and adjustment. The document includes coverage of valve clearance specifications, piston ring configurations, and compression ratios for accurate engine diagnostics. Brake system specifications are included for front and rear disc brake assemblies with caliper dimensions and fluid requirements. Safety procedures are documented for handling coolant, fuel, and electrical components during service operations.

Diagnostic Benchmarks

The manual documents torque specifications for the engine assembly to ensure proper fastener security throughout critical components. Complete wiring diagrams illustrate the ignition coil lead routing, starter motor connections, and battery terminal placement for accurate electrical troubleshooting. Cable routing specifications are provided for throttle control, clutch operation, and brake hose positioning to prevent interference with moving parts.

Structured Parameters

Fluid capacities are listed for coolant, engine oil, and brake fluid systems with mixing ratios and type classifications. Drive chain slack parameters are documented with alignment verification procedures for transmission assembly inspection. Lubrication diagrams identify pressure feed points, splashed scavenging locations, and grease application zones throughout the power plant.

Technical Sequences

The document provides sequential maintenance procedures for regular inspection intervals organized by racing schedule (break-in, every three races, every five races, as required). Pre-operation inspection checklists cover general machine condition assessment before competitive use. Specifications for spark plug gap, carburetor adjustment, and air induction system cleaning complete the documented service requirements.

Integrated Threshold

Detailed specifications reference wheel rim materials and spoke tension procedures for suspension geometry verification. Front fork oil specifications and rear shock absorber pressure data support suspension system optimization. Steering head bearing clearance and swingarm pivot specifications enable chassis alignment confirmation.

The manual documents torque specifications for the engine assembly to ensure proper thread engagement security throughout critical fastening points requiring periodic verification during maintenance cycles.

FAQ

Identify the **correct** valve clearance setting for intake valves? keyboard_arrow_down

0.10 ~ 0.15 mm (0.0039 ~ 0.0059 in) is the specification for intake valve clearance when the engine is cold, as detailed in the maintenance specifications for proper engine operation.

What procedures are **documented** for coolant replacement? keyboard_arrow_down

1.20 L (1.06 Imp qt, 1.27 US qt) total coolant capacity must be filled with a 50%/50% mix of high quality ethylene glycol anti-freeze and soft water, following the complete drain and flush procedure outlined in the cooling system service section.

Determine the **precise** spark plug gap specification? keyboard_arrow_down

0.7 ~ 0.8 mm (0.028 ~ 0.031 in) is the required electrode gap for the CR8E/NGK resistance type spark plug used in this motorcycle engine.

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The information is thorough and easy to understand. Their email support was very responsive when I had questions about the download. Great service!
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I found the multilingual format very useful. The manual is detailed, and the download link arrived promptly after purchase. Highly recommend!
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This manual has been incredibly helpful for maintaining my bike. The download process was seamless and the email support was super quick!