🏷️ Basic Information

Make:

Yamaha

Model:

YZ250

Year:

2000

Product Type:

Service Repair Workshop Manual

Vin Code Prefix:

No VIN-specific information available for this manual

👋 Introduction

Market Niche:

High-performance motocross motorcycle, popular in its era for racing and aggressive trail riding.

Key Competitors:

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

Engine Technology:

Powerful 2-stroke engine, YPVS (Yamaha Power Valve System) for improved powerband.

Suspension Technology:

Advanced KYB Speed Sensitive System (SSS) forks, offering superior damping and adjustability.

Handling:

Renowned for its agile handling and predictable chassis.

📋 Manual Details

Overall Coverage:

Comprehensive service, repair, and maintenance for the 2000 Yamaha YZ250.

Estimated Page Count:

Detailed content implies several hundred pages; precise count not specified in product description.

Manual Type:

Workshop Manual / Service Manual / Repair Manual

Language:

English

Format:

Digital Download (PDF)

📖 Manual Coverage

Engine Mechanical:

Full disassembly, inspection, repair, and reassembly of the 2-stroke engine, including cylinder, piston, crankshaft, connecting rod, bearings, and seals.

Fuel System:

Carburetor (Mikuni VM34SS) overhaul, tuning, jetting, fuel tank, fuel lines, and petcock inspection and service.

Ignition System:

CDI ignition system, timing, spark plug specifications, and troubleshooting.

Cooling System:

Liquid cooling system: radiator, hoses, water pump, thermostat, coolant specifications, and bleeding procedures.

Transmission:

Gearbox inspection, disassembly, assembly, gear shift mechanism, clutch operation, and fluid specifications.

Suspension Front:

KYB Speed Sensitive System (SSS) forks: disassembly, seal replacement, oil change, valving, spring replacement, and adjustment procedures.

Suspension Rear:

Monoshock rear suspension (KYB): linkage disassembly, shock absorber service, spring replacement, oil change, and adjustment procedures.

Brakes Front:

Hydraulic disc brake system: caliper disassembly, piston service, pad replacement, master cylinder overhaul, fluid flush, and bleeding.

Brakes Rear:

Hydraulic disc brake system: caliper disassembly, pad replacement, master cylinder service, fluid flush, and bleeding.

Electrical System:

Wiring diagrams, lighting, horn, battery maintenance, and troubleshooting of electrical components.

Chassis Frame:

Frame inspection, steering head bearing service, swingarm maintenance, and alignment checks.

Bodywork:

Plastic body panel removal and installation, seat, fenders, and handlebars.

Wheels Tires:

Wheel bearing inspection and replacement, spoke tensioning, and tire mounting/dismounting.

Scheduled Maintenance:

Detailed guidelines for routine checks, lubrication, and component replacements at specified intervals.

Troubleshooting:

Systematic diagnostic procedures and common fault finding for engine, electrical, and chassis issues.

Engine Rebuild:

Complete step-by-step instructions for engine overhauls, including torque specifications and clearances.

Suspension Service:

Fork and shock absorber oil changes, seal replacements, and internal component servicing.

Brake System Maintenance:

Hydraulic brake bleeding, pad replacement, and caliper/master cylinder servicing.

Carburetor Tuning:

Guidance on adjusting carburetor settings for optimal performance under various conditions.

Electrical Diagnostics:

Wiring diagram interpretation and troubleshooting of electrical faults.

Diagnostic Capabilities:

Advanced diagnostics for engine performance, electrical systems, and suspension tuning.

Repair Scope:

Covers everything from basic adjustments to full component overhauls and major repairs.

Technical Data:

Includes detailed specifications, measurements, tolerances, and torque values for all components.

Illustrations:

Richly illustrated with clear, step-by-step diagrams and exploded views.

📊 Manual Specifications

File Format:

PDF (Portable Document Format)

Print Quality:

High-resolution scans suitable for clear printing of all diagrams and text.

Binding Type:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

Searchability:

Likely searchable text within the PDF for quick information retrieval.

⚙️ Engine Specifications

Engine Type:

2-stroke, reed valve, liquid-cooled

Displacement:

249 cc (Cubic Centimeters)

Bore X Stroke:

66.4 mm x 72.0 mm

Compression Ratio:

8.5:1 (Nominal)

Ypvs:

Yamaha Power Valve System

Horsepower:

Approximately 45-50 HP (figures can vary based on tuning and specific test conditions)

Torque:

Approximately 27-30 lb-ft (figures can vary based on tuning and specific test conditions)

Carburetor:

Mikuni VM34SS, single

Fuel Type:

Unleaded gasoline

Recommended Fuel Octane:

91 or higher octane recommended

Fuel Mixture:

Requires premixing of gasoline and 2-stroke oil (typically 30:1 or 40:1 ratio, consult manual for specifics).

Premix Oil Type:

High-quality 2-stroke motorcycle oil (e.g., Yamalube 2R, Motul 800 2T Factory Line).

🔧 Transmission

Transmission Type:

Constant mesh, 5-speed

Optional Gearing:

No optional gear sets mentioned for this model.

Clutch Type:

Wet, multiple-disc, cable-operated

Final Drive:

Chain drive

Transmission Oil Type:

Hypoid gear oil SAE 80 (e.g., Yamalube Gear Oil).

Transmission Oil Capacity:

Approximately 0.85 Liters (consult manual for exact capacity and level check procedure).

📐 Dimensions

Length:

2170 mm (85.4 in)

Width:

825 mm (32.5 in)

Height:

1275 mm (50.2 in)

Seat Height:

985 mm (38.8 in)

Wheelbase:

1480 mm (58.3 in)

Ground Clearance:

360 mm (14.2 in)

Dry Weight:

96 kg (211.6 lbs)

Wet Weight:

Approximately 104 kg (229 lbs) with fluids

Fuel Tank Capacity:

8.0 Liters (2.1 US gal, 1.8 Imp gal)

🛡️ Safety Features

Safety Ratings:

Motorcycles are not typically rated by organizations like NHTSA or IIHS in the same way as cars. Safety is primarily dependent on rider skill and adherence to safe riding practices.

Braking System:

Powerful hydraulic disc brakes front and rear provide stopping power.

Suspension Stability:

Advanced suspension contributes to rider control and stability over varied terrain.

Frame Construction:

Robust frame design contributes to overall structural integrity.

Rider Ergonomics:

Designed for an aggressive riding posture, allowing rider input for control.

💡 Technology Features

Infotainment System:

N/A (This is a motocross motorcycle, not equipped with infotainment systems).

Driver Assistance Features:

N/A (This is a motocross motorcycle, not equipped with electronic driver assistance systems).

Connectivity Options:

N/A (This is a motocross motorcycle, not equipped with connectivity options).

Engine Management System:

Mechanical carburetor with YPVS (Yamaha Power Valve System) controlled by engine RPM.

🔧 Maintenance

Oil Change Transmission:

Every 10-15 hours of riding or annually, whichever comes first.

Air Filter Cleaning:

After every few rides, or more frequently in dusty conditions.

Spark Plug Inspection:

Every 10-20 hours of riding.

Top End Rebuild:

Recommended every 30-50 hours of riding, depending on usage and care.

Fork Oil Change:

Every 20-30 hours of riding, or as needed for performance degradation.

Coolant Type:

Permanent type anti-freeze coolant (50% solution with distilled water).

Brake Fluid Type:

DOT 4 hydraulic brake fluid.

Clutch Wear:

Clutch plates can wear over time, especially with aggressive riding or improper operation.

Power Valve Sticking:

The YPVS mechanism can accumulate carbon buildup and stick if not regularly cleaned and maintained.

Suspension Seals:

Fork and shock seals can degrade over time and may require replacement to prevent leaks.

Carburetor Jetting:

May require re-jetting to optimize performance for changes in altitude, temperature, or aftermarket exhaust/intake modifications.

📚 Vehicle History

Yamaha Motorcycles:

Yamaha has a long and distinguished history in motorcycle racing and production, known for innovation and performance, particularly in the off-road segment.

Yz Series Development:

The YZ250 is part of Yamaha's highly successful YZ motocross lineage, which has seen continuous development and multiple championship wins.

2000 Model Updates:

The 2000 YZ250 featured the advanced KYB SSS (Speed Sensitive System) front forks, a significant technological advancement at the time, offering superior damping characteristics.

Manufacturing Location:

Primarily manufactured in Japan by Yamaha Motor Corporation.

🏆 Awards & Recognition

Motocross Awards:

The Yamaha YZ250 has a long history of success in professional motocross and supercross racing, earning numerous accolades and championships throughout its production run. While specific awards for the 2000 model aren't detailed here, the lineage is highly decorated.

Performance Ratings:

Consistently rated highly by enthusiasts and professional riders for its potent engine and excellent handling.

Emissions Certification:

Off-road motorcycles typically have different emission standards than street-legal vehicles, and may not have explicit certifications in the same manner.