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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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.
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