🏷️ Basic Information

Make:

Yamaha

Model:

YZ250F

Year:

2006

Vehicle Type:

Motocross Motorcycle

Vin Prefix:

JY4

Engine Code Prefix:

5SP

👋 Introduction

Segment:

High-performance 250cc four-stroke motocross competition bike.

Target Audience:

Motocross racers, off-road enthusiasts, and DIY mechanics looking for in-depth repair and maintenance information.

Key Competitors 2006:

Honda CRF250R, Kawasaki KX250F, Suzuki RM-Z250.

Vehicle Focus:

The 2006 YZ250F was a significant model known for its strong low-to-midrange power delivery and agile handling, making it a competitive choice in its class.

Manual Value Proposition:

Provides essential factory-level technical data for owners and technicians to maintain, diagnose, and repair the 2006 Yamaha YZ250F effectively.

📋 Manual Details

Manual Type:

Service Repair Manual

Language:

English

Format:

Digital Download (PDF)

Estimated Pages:

300-400

📖 Manual Coverage

Engine Mechanical:

Complete disassembly, inspection, repair, and reassembly of engine components (cylinder, piston, crankshaft, connecting rod, valves, camshafts, etc.).

Fuel System:

Carburetor tuning, cleaning, and rebuilding; fuel pump, fuel lines, and fuel tank inspection.

Ignition System:

CDI unit, spark plug inspection and replacement, ignition timing.

Cooling System:

Radiator, hoses, thermostat, and coolant flush procedures.

Transmission Drivetrain:

Clutch operation, inspection, and adjustment; gearbox disassembly and reassembly, gear ratios, lubrication.

Suspension Front:

Fork leg disassembly, seal replacement, oil levels, damping adjustments, and general maintenance.

Suspension Rear:

Monoshock absorber service, linkage inspection and lubrication, spring preload adjustment.

Brakes Front:

Caliper service, pad replacement, rotor inspection, hydraulic system bleeding.

Brakes Rear:

Caliper service, pad replacement, rotor inspection, hydraulic system bleeding.

Electrical System:

Wiring diagrams, component testing, battery maintenance, lighting system.

Frame Chassis:

Frame inspection, subframe mounting, steering head bearing service.

Bodywork:

Plastic panel removal and installation, seat, fuel tank cover.

Wheels Tires:

Spoke tensioning, rim inspection, tire mounting and balancing, wheel bearing service.

Routine Maintenance:

Oil changes, filter replacements, chain adjustment and lubrication, air filter cleaning.

Troubleshooting:

Diagnostic procedures for common and uncommon running issues, electrical faults, and mechanical failures.

Repair Procedures:

Detailed step-by-step instructions for component repair and replacement.

Rebuild Procedures:

Comprehensive guides for major component overhauls (e.g., engine, suspension).

Specifications Torque:

Torque specifications for all critical fasteners.

Wiring Diagrams:

Detailed electrical schematics for accurate diagnosis and repair.

Depth Level:

Comprehensive, covering everything from basic maintenance to complete engine and suspension rebuilds.

Diagnostic Capabilities:

Advanced troubleshooting guides and diagnostic tree charts.

Illustrations:

High-quality, clear, step-by-step illustrations and diagrams.

📊 Manual Specifications

File Type:

PDF

Searchable Text:

Likely searchable text, allowing for quick information retrieval.

Printability:

Designed for printing specific sections or the entire manual.

Binding Type Digital:

N/A (Digital Download)

Paper Type Digital:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Type:

Liquid-cooled, four-stroke, DOHC, single-cylinder

Displacement:

250cc (249 cm³)

Bore X Stroke:

77.0 mm x 53.6 mm

Compression Ratio:

12.5:1 (typical)

Valve Train:

DOHC, 4 valves

Horsepower Estimated:

Approx. 38-40 HP (at crank)

Torque Estimated:

Approx. 20-22 lb-ft (at crank)

Carburetor:

Keihin FCR MX37 with Dual-Jet System

Fuel Type:

Unleaded gasoline, minimum 91 octane

Oil Type:

Yamalube 4 (or equivalent) SAE 10W-40 API SG, SE, SF, SG

Oil Capacity:

Approx. 1.10 L (without filter change), 1.20 L (with filter change)

🔧 Transmission

Transmission Type:

Constant-mesh 5-speed

Clutch Type:

Wet, multi-plate

Drive:

Chain drive

Gear Ratios:

Manual will detail specific gear ratios.

Transmission Oil Type:

Yamalube 4 (or equivalent) SAE 10W-40 API SG, SE, SF, SG

Transmission Oil Capacity:

Approx. 0.70 L

📐 Dimensions

Overall Length:

Approx. 82.6 inches (2098 mm)

Overall Width:

Approx. 32.3 inches (820 mm)

Overall Height:

Approx. 50.6 inches (1285 mm)

Seat Height:

Approx. 38.0 inches (965 mm)

Wheelbase:

Approx. 58.1 inches (1475 mm)

Ground Clearance:

Approx. 13.6 inches (345 mm)

Dry Weight:

Approx. 216 lbs (98 kg)

Wet Weight:

Approx. 234 lbs (106 kg) (with all fluids)

Fuel Capacity:

2.1 US gal (8.0 L)

🛡️ Safety Features

Crash Test Ratings:

N/A (Competition Motorcycle - not subject to automotive crash testing standards)

Braking System Front:

Hydraulic disc brake

Braking System Rear:

Hydraulic disc brake

Lighting:

Headlight and taillight for visibility; no turn signals typically found on competition models.

💡 Technology Features

Infotainment System:

N/A (Competition Motorcycle - no infotainment features).

Driver Assistance Features:

N/A (Competition Motorcycle - no electronic driver assistance systems).

Connectivity Features:

N/A (Competition Motorcycle - no integrated connectivity).

Fuel Delivery Tech:

Advanced Keihin FCR MX carburetor with Dual-Jet system for improved throttle response and broader powerband.

Cooling Technology:

Liquid cooling system with dual radiators for efficient heat dissipation under demanding conditions.

🔧 Maintenance

Engine Oil Change:

Every 5-10 hours of riding or as specified in the manual.

Oil Filter Replacement:

With every oil change.

Air Filter Cleaning:

Every 2-4 hours of riding, depending on conditions.

Spark Plug Inspection:

Every 10-20 hours of riding.

Chain Lubrication:

Every 5-10 hours of riding, or after washing.

Valve Clearance Check:

Every 20-30 hours of riding (crucial for performance).

Fork Oil Change:

Every 20-40 hours of riding.

Engine Oil Spec:

Yamalube 4 (or equivalent) SAE 10W-40 API SG, SE, SF, SG

Coolant Spec:

High-quality ethylene glycol-based antifreeze mixed with distilled water (50/50 ratio).

Brake Fluid Spec:

DOT 3 or DOT 4 hydraulic brake fluid.

Common Wear Items:

Clutch plates, piston rings, valve guides/seals, wheel bearings, fork seals, chain and sprockets.

Carburetor Tuning:

Can be sensitive to altitude and temperature changes, requiring careful jetting and adjustments.

Suspension Maintenance:

Regular servicing is critical for optimal performance and longevity, especially for competitive use.

📚 Vehicle History

Manufacturer:

Yamaha Motor Corporation, Japan.

Motorsport Legacy:

Yamaha has a long and successful history in professional motocross and off-road racing, with the YZ line being a cornerstone of their performance offerings.

Yz250F Introduction Year:

The YZ250F platform was introduced by Yamaha in 2001, revolutionizing the 250cc four-stroke class.

2006 Updates:

The 2006 model featured several refinements over previous years, including chassis improvements, updated suspension settings, and engine tuning for enhanced performance. It continued the trend of offering a potent four-stroke alternative to 250cc two-strokes.

Manufacturing Location:

Japan

🏆 Awards & Recognition

Motocross Awards:

While specific awards for the 2006 model aren't readily cataloged, the YZ250F line consistently received positive reviews and was a championship contender in various motocross series throughout the 2000s.