Yamaha YZ250 Service Manual Repair 2000 YZ 250

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🏷️ Basic Information Identification Make: Yamaha Model: YZ250 Year: 2000 Vehicle Type: Motocross Motorcycle Codes Chassis Code: 4SP1 👋 Introduction Market Position Category: Performance Motocross Motorcycle Target Audience: Enthusiast riders,...

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类型: Motorcycle

斯库: 285040

标签: 2000 Motorcycle Motorcycles Yamaha YZ Models YZ250

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Description

🏷️ Basic Information

Identification

Make:

Yamaha

Model:

YZ250

Year:

Vehicle Type:

Motocross Motorcycle

Codes

Chassis Code:

👋 Introduction

Market Position

Category:

Performance Motocross Motorcycle

Target Audience:

Enthusiast riders, mechanics, and those seeking to maintain or restore a 2000 Yamaha YZ250

Competitive Analysis

Competitors 2000:

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

Key Features

Engine Type:

Two-stroke, liquid-cooled, reed valve, YPVS (Yamaha Power Valve System)

Suspension Front:

Upside-down telescopic fork, fully adjustable (KYB/Showa specific to model variant)

Suspension Rear:

Monocross suspension with adjustable piggyback reservoir shock (KYB/Showa specific to model variant)

Braking Front:

Hydraulic disc brake

Braking Rear:

Hydraulic disc brake

📋 Manual Details

Coverage Areas

Coverage Scope:

Complete tear down and rebuild

Page Count

Page Count:

Manual Type

Manual Type:

Factory Service Manual / Repair Manual

Language

Language:

English

Format

Format:

Digital Download (Likely PDF)

Features:

Clickable chapters, i...

📖 Manual Coverage

Systems Covered

Engine:

Complete engine disassembly, assembly, tuning, and troubleshooting

Transmission:

Gearbox inspection, maintenance, and repair procedures

Chassis:

Frame, subframe, swingarm, and linkage system service

Suspension:

Front forks (KYB/Showa), rear shock absorber (KYB/Showa), linkage, and seals maintenance and overhaul

Brakes:

Front and rear hydraulic brake systems, caliper, master cylinder, and fluid service

Fuel System:

Carburetor (Keihin PWK 38), fuel tank, lines, and petcock service

Cooling System:

Radiator, hoses, and coolant maintenance (though typically air-cooled, may cover related components)

Electrical System:

Ignition system, lighting, stator, CDI unit, wiring diagrams, and troubleshooting

Exhaust System:

Expansion chamber, silencer, and mounting hardware service

Bodywork:

Plastics, seat, fenders, and graphics replacement and fitting

Wheels And Tires:

Spoke tension, rim maintenance, tire fitting, and bearing service

Procedures Included

Routine Maintenance:

Oil changes, filter cleaning/replacement, chain adjustment, spark plug service, air filter maintenance

Troubleshooting:

Diagnostic procedures for common running issues, electrical faults, and mechanical problems

Engine Rebuild:

Piston, ring, cylinder, crankshaft, connecting rod, and bearing replacement

Suspension Rebuild:

Fork seal replacement, oil changes, damper rod service, rear shock seal head and bladder replacement

Carburetor Tuning:

Jetting recommendations, float height adjustment, and idle speed settings

Brake Bleeding:

Complete procedure for bleeding hydraulic brake systems

Wiring Diagrams:

Detailed electrical schematics for fault finding and component identification

Special Tools:

Identification and usage of specialized tools required for specific procedures

Technical Depth

Depth Level:

Comprehensive: Covers everything from basic rider maintenance to full engine and chassis overhauls

Visuals:

Includes photographs and part diagrams to illustrate procedures and component identification

📊 Manual Specifications

File Format

File Type:

PDF (implied by digital download with clickable chapters)

Print Quality

Resolution:

High-resolution, suitable for printing

Binding Type

Binding Type:

N/A (Digital Download)

Paper Type

Paper Type:

N/A (Digital Download)

⚙️ Engine Specifications

Primary Engine

Engine Type:

2-stroke, single-cylinder, reed valve induction

Displacement:

249 cc

Bore X Stroke:

66.4 mm x 72 mm

Compression Ratio:

8.2:1 (typical for this era, manual will confirm)

Cooling System:

Liquid-cooled

Ignition:

CDI (Capacitor Discharge Ignition)

Carburetor:

Keihin PWK38S, single, with Power Jet

Ypvs:

Yamaha Power Valve System (mechanical)

Performance

Horsepower:

Approx. 50-52 hp (at crankshaft, typical for this model)

Torque:

Approx. 32-34 lb-ft (at crankshaft, typical for this model)

Fuel System

Fuel Type:

Unleaded gasoline (91 octane or higher recommended)

Oil Mixture:

2-stroke engine oil, 32:1 ratio (Yamalube or equivalent recommended)

🔧 Transmission

Standard

Transmission Type:

5-speed constant mesh

Clutch:

Wet, multiple-disc, cable-actuated

Features

Gear Ratios:

Specific ratios detailed within the manual (e.g., 1st: 2.5, 2nd: 1.88, 3rd: 1.5, 4th: 1.23, 5th: 1.0)

Final Drive:

O-ring sealed chain, 13/48 tooth sprockets (typical, manual will confirm)

📐 Dimensions

Exterior

Overall Length:

Approx. 2,170 mm (85.4 in)

Overall Width:

Approx. 820 mm (32.3 in)

Overall Height:

Approx. 1,270 mm (50.0 in)

Wheelbase:

Approx. 1,475 mm (58.1 in)

Ground Clearance:

Approx. 355 mm (14.0 in)

Seat Height:

Approx. 990 mm (39.0 in)

Weights

Dry Weight:

Approx. 98 kg (216 lbs)

Wet Weight:

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

Fuel Tank Capacity:

9.0 liters (2.4 gal)

🛡️ Safety Features

Ratings

Safety Certification:

N/A (Off-road vehicle, not subject to road safety regulations)

Active Features

Handling:

Designed for aggressive off-road riding, agile handling characteristics

Passive Features

Chassis Design:

Strong steel perimeter frame for rigidity and durability

💡 Technology Features

Infotainment

Infotainment System:

N/A (Basic motocross motorcycle, no electronic infotainment)

Driver Assistance

Electronic Aids:

N/A (Mechanical operation, no electronic rider aids)

Connectivity

Connectivity Features:

N/A (No Bluetooth, Wi-Fi, or smartphone integration)

Key Technologies

Ypvs:

Yamaha Power Valve System (YPVS) electronically controlled exhaust valve that optimizes power band across the RPM range.

🔧 Maintenance

Service Intervals

Air Filter Cleaning:

After every few rides or as needed based on conditions (detailed in manual)

Spark Plug Inspection:

Every 10-20 hours of riding (manual will specify exact interval and type)

Chain Lubrication Adjustment:

Every ride before and after use, adjust tension as needed (manual specifies limits)

Engine Oil Level Check:

Before every ride

Coolant Level Check:

Before every ride (for liquid-cooled models)

Transmission Oil Change:

Every 15-25 hours of riding (manual will specify exact interval and oil type/capacity)

Fluid Specifications

Engine Oil:

Yamaha recommends Yamalube 2T or equivalent API-TC, JASO FD, ISO-L-EGD certified 2-stroke oil. Mixture ratio 32:1.

Transmission Oil:

Yamaha Gear Oil XYZ (e.g., GL-4 SAE 10W-30 or 20W-40). Manual will specify precise viscosity and capacity.

Brake Fluid:

DOT 3 or DOT 4 hydraulic brake fluid. Manual specifies type and capacity for bleeding.

Coolant:

Permanent type antifreeze/coolant, 50% mixture with distilled water. Manual specifies capacity.

Known Issues

Ypvs Operation:

Carbon buildup in the YPVS system can lead to sticking or reduced performance. Regular cleaning as per the manual is crucial.

Clutch Cable Wear:

Frequent use can lead to clutch cable wear and potentially stiff operation. Lubrication and adjustment are key.

Suspension Seals:

Like all dirt bikes, fork and shock seals can wear over time and require replacement to prevent leaks.

Carburetor Jetting:

Altitude and temperature changes can require carburetor jetting adjustments for optimal performance, as detailed in the manual.

📚 Vehicle History

Brand Heritage

Manufacturer:

Yamaha Motor Company, Ltd.

Motorsport Legacy:

Yamaha has a long and successful history in motocross racing, with the YZ line being a cornerstone.

Model Evolution

Yz Line Introduction:

The YZ250 has been a competitive 250cc two-stroke motocross bike for Yamaha for decades, undergoing continuous development.

Year 2000 Updates:

The 2000 model represented an evolution of the chassis and engine, often featuring revised suspension settings and minor performance tweaks over previous years. Specific details are in the manual.

Production

Production Period:

Ongoing since the 1970s, with significant updates in the late 1990s and early 2000s.

🏆 Awards & Recognition

Recognitions

Motocross Reputation:

The YZ250 is consistently lauded for its potent two-stroke power, light weight, and excellent handling, making it a favorite among riders and in competitive classes.

Class Leader:

Often considered a benchmark in the 250cc two-stroke motocross segment for its era.

Certifications

Factory Manual Validation:

This manual is a direct factory document, ensuring accuracy and completeness for official service procedures.