🏷️ Basic Information

Make:

Yamaha

Model:

WR450F

Year:

2006

Vehicle Type:

Off-road Motorcycle (Competition Enduro)

Manual Product Code:

Unknown (typically a Yamaha publication number)

👋 Introduction

Market Segment:

High-performance, competitive off-road motorcycle designed for enduro racing and aggressive trail riding.

Key Competitors 2006:

KTM 450 EXC, Honda CRF450X, Kawasaki KX450F (off-road variant), Suzuki RM-Z450 (off-road variant).

Vehicle Key Features:

Liquid-cooled, DOHC, four-valve, 450cc engine; electric start; aluminum frame; powerful front and rear disc brakes; adjustable suspension; robust chassis for demanding terrain.

Manual Utility:

Essential tool for owners and technicians to maintain, diagnose, and repair the 2006 Yamaha WR450F, ensuring optimal performance, longevity, and safety. Provides factory-level repair information.

📋 Manual Details

Manual Title:

2006 Yamaha WR450F Service Manual

Manual Content Overview:

General Information, Specifications, Regular Inspection and Adjustment, Engine, Chassis, Electrical, Tuning.

Page Count:

Unknown (typically 300-500 pages for a comprehensive service manual)

Manual Type:

Service/Repair Manual

Language:

English

Format:

Digital (likely PDF)

📖 Manual Coverage

Engine Systems:

Top end (cylinder, piston, valves), bottom end (crankshaft, connecting rod, bearings), lubrication system, cooling system (liquid cooling), fuel system (carburetion, fuel pump), ignition system, starting system (electric start).

Chassis Systems:

Frame, suspension (front forks, rear shock absorber), swingarm, steering system, braking system (front and rear hydraulic disc brakes), wheels, tires, exhaust system, fuel tank, seat, handlebars.

Electrical Systems:

Wiring harness, battery, charging system (stator, regulator/rectifier), lighting (headlight, taillight, brake light), instrumentation (speedometer, odometer, indicator lights), starting system (starter motor, starter clutch), ignition system components.

Routine Maintenance:

Oil changes, filter replacements (oil, air), spark plug maintenance/replacement, chain adjustment and lubrication, brake system inspection, tire pressure checks, coolant checks, pre-ride inspections.

Repair Procedures:

Engine disassembly and reassembly (top end, bottom end), transmission service, carburetor overhaul, suspension fork service, rear shock absorber service, brake caliper overhaul, wheel bearing replacement, electrical component diagnosis and replacement.

Troubleshooting Diagnostics:

Diagnosis of common starting problems, engine performance issues, electrical faults, braking system issues, suspension performance problems.

Tuning Adjustments:

Carburetor jetting adjustments for altitude and conditions, ignition timing checks, suspension setup and adjustments, valve clearance adjustments.

Depth Of Coverage:

Comprehensive, covering all aspects of maintenance, troubleshooting, repair, and tuning from basic checks to complete engine and chassis overhauls. Includes detailed exploded diagrams, torque specifications, and diagnostic flowcharts.

📊 Manual Specifications

File Format:

PDF

Print Quality Digital:

High-resolution, clear text and diagrams. Searchable text for efficient information retrieval.

Binding Type:

N/A (Digital Format)

Paper Type:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Type:

4-stroke, liquid-cooled, DOHC, 4-valve, single cylinder

Displacement:

449 cc (27.4 cu. in.)

Bore X Stroke:

95.0 mm x 63.4 mm (3.74 in x 2.50 in)

Compression Ratio:

12.3:1

Horsepower Estimated:

Approximately 50-53 hp (at crankshaft, unconfirmed) – specific figures often not officially published for competition bikes.

Torque Estimated:

High mid-range and top-end torque, optimized for off-road acceleration.

Carburetor:

Keihin FCR MX40 with accelerator pump

Fuel Type:

Unleaded gasoline, minimum 87 octane

Ignition:

Digital CDI

Cooling Method:

Liquid-cooled

Lubrication Type:

Wet sump with oil cooler

Starter:

Electric starter, kick starter backup

🔧 Transmission

Transmission Type:

Constant-mesh 5-speed

Clutch Type:

Wet, multiple disc

Gear Ratios:

Specific gear ratios available in manual: 1st: 2.462, 2nd: 1.777, 3rd: 1.381, 4th: 1.150, 5th: 0.960

Final Drive:

Chain drive

📐 Dimensions

Length:

2180 mm (85.8 in)

Width:

825 mm (32.5 in)

Height:

1280 mm (50.4 in)

Seat Height:

980 mm (38.6 in)

Wheelbase:

1480 mm (58.3 in)

Dry Weight:

113 kg (249 lbs)

Wet Weight Estimated:

Approximately 120 kg (265 lbs) with all fluids.

Front Suspension Travel:

300 mm (11.8 in) – Fully adjustable Kayaba USD forks

Rear Suspension Travel:

310 mm (12.2 in) – Fully adjustable Kayaba Monoshock

Front Tire:

80/100-21 51M

Rear Tire:

110/100-18 64M

Front Brake:

Hydraulic disc, 250mm diameter

Rear Brake:

Hydraulic disc, 245mm diameter

Fuel Tank Capacity:

9.0 liters (2.4 US gallons)

🛡️ Safety Features

Safety Certification:

Off-road competition vehicle. Not typically subject to road-legal safety standards or crash ratings.

Active Safety Features:

Powerful hydraulic disc brakes for effective stopping power in varied conditions.

Passive Safety Features:

Sturdy aluminum frame, robust suspension components designed to absorb impacts.

💡 Technology Features

Infotainment System:

N/A (Pure competition off-road motorcycle; features basic instrumentation only).

Driver Assistance Features:

N/A

Connectivity Features:

N/A

Instrument Cluster:

Digital speedometer, odometer, trip meter, clock, engine hour meter (optional/accessory), indicator lights (neutral, high beam, oil level).

🔧 Maintenance

Engine Oil Change:

Every 10-15 hours of riding or as specified by manual (typically 500-1000 miles for general use, but off-road use is much harder on oil).

Oil Filter Replacement:

At every oil change.

Air Filter Cleaning/Replacement:

Frequent cleaning/replacement recommended, especially in dusty conditions (every 5-10 hours).

Spark Plug Inspection/Replacement:

Check every 10-15 hours, replace as needed.

Valve Clearance Check:

Initial check at 1000 km (600 miles), then every 5000 km (3000 miles) or as per manual.

Engine Oil Type:

Yamalube 4 (or equivalent) SAE 10W-40, API SG or higher, JASO MA certified.

Engine Oil Capacity:

1.00 liter (1.06 US qt) without filter change; 1.10 liters (1.16 US qt) with filter change.

Coolant Type:

Yamaha Performance 2-Stroke Coolant or equivalent permanent type antifreeze (50% mixture with distilled water).

Brake Fluid Type:

DOT 4

Fork Oil Type:

Yamaha Suspension Fluid (YFS) 01 or equivalent SAE 0W-20 (verify specific fork oil weight in manual).

Common Issues 2006 Wr450F:

Carburetor jetting sensitive to altitude and temperature changes, requiring frequent adjustment; potential for clutch wear under aggressive use; regular maintenance of air filter crucial to prevent engine damage from dirt ingress.

📚 Vehicle History

Yamaha Motorcycles:

Yamaha Motor Company is a leading Japanese manufacturer known for its innovation and success in motorsports, particularly in off-road and motocross racing.

Wr450F Lineage:

The WR450F is Yamaha's flagship 4-stroke enduro competition machine, evolving from earlier YZ-based enduro models. The 2003 model year saw a significant redesign with an aluminum frame and a fuel-injected engine (though the 2006 model reverts to a carburetor, reflecting market preferences and tuning flexibility for competition). This generation is renowned for its potent engine and capable chassis.

Production Location:

Japan

🏆 Awards & Recognition

Motorsport Success:

Yamaha WR models have a strong history of success in enduro racing, GNCC, and various regional off-road championships.