Now Yamaha YZ250 YZ 250 2006 06 2-STROKE Service Repair Workshop Manual

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🏷️ Basic Information Identification Make: Yamaha Model: YZ250 Year: 2006 Engine Type: 2-Stroke Model Code: YZ250F Generation Generation Identifier: Third Generation (1999-2001), Fourth Generation (2002-2004), Fifth Generation (2005-2014) Current Generation...

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类型: Motorcycle

斯库: 245545

标签: 2006 Motorcycle Motorcycles Yamaha YZ 250 YZ Models YZ250

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Description

🏷️ Basic Information

Identification

Make:

Yamaha

Model:

YZ250

Year:

Engine Type:

2-Stroke

Model Code:

YZ250F

Generation

Generation Identifier:

Third Generation (1999-2001), Fourth Generation (2002-2004), Fifth Generation (2005-2014)

Current Generation Start Year:

👋 Introduction

Market Position

Market Segment:

High-performance Motocross (MX) competition bike.

Target Audience:

Motocross racers, off-road enthusiasts, and mechanics requiring in-depth repair and maintenance knowledge.

Competitive Analysis

Key Competitors 2006:

KTM 250 SX, Honda CR250R, Suzuki RM250, Kawasaki KX250.

Key Features

Engineering Philosophy:

Yamaha's focus on powerful 2-stroke engines, robust chassis, and advanced suspension for competitive MX performance.

Model Significance:

The YZ250 is a legendary model in motocross, known for its consistent performance and tunability, with the 2006 model representing an evolution of a proven platform.

📋 Manual Details

Coverage Areas

Covered Years:

2006, with notes for similar years and models

Covered Models:

YZ250

Page Count

Estimated Page Count:

400-500 (typical for comprehensive service manuals of this era)

Manual Type

Manual Type:

Service Repair Workshop Manual

Language

Language:

English

Format

Format:

Digital (likely PDF)

📖 Manual Coverage

Systems Covered

Engine:

Complete disassembly, assembly, inspection, troubleshooting, and repair of the 2-stroke engine.

Cooling System:

Radiator, hoses, thermostat, water pump, coolant specifications, and flushing procedures.

Fuel System:

Carburetor (Mikuni VM38), jetting, cleaning, adjustment, fuel tank, fuel lines, and petcock.

Ignition System:

CDI, ignition coil, spark plug, timing, and troubleshooting.

Transmission:

Clutch operation, gearbox disassembly, inspection, assembly, and lubrication.

Suspension:

Front forks (Kayaba Speed-Sensitive System) – disassembly, servicing, oil type, level, and adjustments. Rear shock absorber (Monoshock) – disassembly, servicing, spring preload, compression, and rebound damping adjustments.

Brakes:

Front and rear hydraulic disc brake systems – caliper overhaul, master cylinder servicing, brake fluid type (DOT 4), bleeding procedures, pad replacement, and rotor inspection.

Electrical System:

Wiring diagrams, lighting, battery, charging system (if applicable to a MX bike), and troubleshooting electrical faults.

Chassis Frame:

Frame inspection, steering head bearing service, swingarm pivot, and linkage maintenance.

Wheels Tires:

Spoke tensioning, wheel bearing service, tire pressure recommendations, and tire changing procedures.

Procedures Included

Maintenance:

Scheduled maintenance checks, lubrication points, filter cleaning/replacement, and general upkeep.

Troubleshooting:

Diagnostic charts for common problems (starting issues, poor performance, overheating, etc.) with step-by-step solutions.

Repair:

Detailed, illustrated instructions for component disassembly, cleaning, inspection, repair, and reassembly for all major systems.

Adjustment:

Carburetor tuning, suspension settings, chain slack, clutch lever free play, and brake lever free play adjustments.

Overhaul:

Complete engine top-end and bottom-end rebuild procedures, including piston, rings, cylinder, crankshaft, and connecting rod service.

Specification Checking:

Torque specifications for all fasteners, engine clearances (piston-to-cylinder, ring gap), and critical component measurements.

Technical Depth

Depth Level:

Comprehensive (covers from basic maintenance to full engine rebuilds and advanced diagnostics).

Diagnostics:

Detailed troubleshooting guides and diagnostic trees for identifying and resolving mechanical and electrical issues.

Illustrations:

Includes exploded views, line drawings, and potentially some photographic illustrations to guide procedures.

Part Numbers:

Likely includes OEM part numbers for many components, aiding in ordering replacements.

📊 Manual Specifications

File Format

File Format:

Searchability:

Likely text-searchable if created from a digital source or OCR'd.

Print Quality

Print Quality:

Variable (depends on original source, but professional digital versions are usually high resolution).

Binding Type

Binding Type:

N/A (Digital Format)

Paper Type

Paper Type:

N/A (Digital Format)

⚙️ Engine Specifications

Primary Engine

Engine Size:

249cc

Engine Configuration:

Single-cylinder, liquid-cooled, reed valve, 2-stroke.

Bore X Stroke:

66.4 mm x 72.0 mm

Compression Ratio:

8.8:1 (approximate, may vary based on specific tuning/squish)

Power Valve System:

Yamaha Power Valve System (YPVS) for optimized powerband.

Performance

Horsepower Estimate:

Approximately 45-50 HP at peak (dyno dependent, stock configuration).

Torque Estimate:

Approximately 30-33 lb-ft at peak (dyno dependent, stock configuration).

Fuel System

Carburetor Model:

Mikuni TMX VM38SS (38mm flat slide carburetor).

Fuel Type:

Unleaded gasoline (minimum 91 octane recommended).

Fuel Mixture:

50:1 ratio with high-quality 2-stroke oil.

🔧 Transmission

Standard

Transmission Type:

5-speed constant mesh sequential manual transmission.

Optional

Optional Gearing:

Aftermarket sprockets and chain for tuning gear ratios.

Features

Clutch Type:

Wet, multi-plate clutch.

Clutch Fluid:

Yamalube or equivalent mineral oil-based hydraulic fluid (check manual for specific type).

📐 Dimensions

Exterior

Length:

Approx. 2170 mm (85.4 in)

Width:

Approx. 825 mm (32.5 in)

Height:

Approx. 1280 mm (50.4 in)

Wheelbase:

Approx. 1475 mm (58.1 in)

Ground Clearance:

Approx. 335 mm (13.2 in)

Seat Height:

Approx. 990 mm (39.0 in)

Weights

Dry Weight:

Approx. 97 kg (213.8 lbs)

Fuel Capacity:

7.0 liters (1.8 US gal)

🛡️ Safety Features

Ratings

Safety Certification:

Not Applicable (Competition Off-Road Vehicle)

Active Features

Braking System:

High-performance hydraulic disc brakes front and rear for superior stopping power.

Suspension Control:

Adjustable suspension allows for tuning to rider preference and track conditions, enhancing stability and control.

Passive Features

Chassis Design:

Sturdy aluminum frame provides rigidity and predictable handling.

💡 Technology Features

Infotainment

Infotainment System:

N/A (Competition Motocross Bike - No Infotainment)

Driver Assistance

Driver Assistance Features:

N/A (Competition Motocross Bike - No Electronic Driver Aids)

Connectivity

Connectivity Features:

N/A (Competition Motocross Bike - No Connectivity)

🔧 Maintenance

Service Intervals

Oil Change:

2-stroke oil mixture: Every fuel tank. Transmission oil: Every 10-15 hours of riding.

Air Filter Cleaning:

After every few rides or as needed based on dust conditions.

Spark Plug Replacement:

Recommended every 20-30 hours of riding, or as inspection dictates.

Piston Ring Replacement:

Top-end rebuild recommended every 30-50 hours of hard riding.

Fluid Specifications

Engine Oil:

Yamalube 2R or equivalent high-performance synthetic 2-stroke oil (50:1 mix ratio).

Transmission Oil:

Yamalube Hi-Gear Oil or equivalent SAE 10W-30 API SG, SF transmission oil.

Brake Fluid:

DOT 4 hydraulic brake fluid.

Coolant:

Yamahaanna Super Coolant or equivalent high-quality ethylene glycol based antifreeze (50/50 mix with distilled water).

Known Issues

Carburetor Jetting:

Requires careful jetting based on altitude, temperature, and riding style for optimal performance and longevity. The stock jetting might be lean in some conditions.

Clutch Wear:

Clutch plates can wear prematurely with aggressive riding. Regular inspection and adjustment are important.

Suspension Seals:

Fork and shock seals can be prone to leaks, especially in dusty or harsh conditions. Regular cleaning and inspection are recommended.

Ypvs Operation:

The YPVS mechanism can accumulate carbon and seize if not properly maintained, affecting engine power delivery. Regular cleaning is crucial.

📚 Vehicle History

Brand Heritage

Yamaha Motorsports:

Yamaha has a long and storied history in motorsports, particularly in motocross, with a reputation for innovation and race-winning machinery.

Model Evolution

Yz250 Lineage:

The YZ250 has been a dominant force in the 250cc motocross class for decades, undergoing continuous refinement and technological advancements. The 2006 model benefited from extensive R&D from previous generations.

Production

Production Era:

The YZ250 has been in continuous production since its introduction in the 1970s, making it one of the longest-running and most iconic models in motocross.

🏆 Awards & Recognition

Recognitions

Motocross Championships:

The YZ250 platform has been instrumental in numerous professional and amateur motocross championships worldwide.

Ratings

Magazine Reviews 2006:

Likely received positive reviews from motocross publications for its strong engine performance and capable chassis.