Yamaha DT125 DT125R 1988-2002 Workshop Service Manual Repair

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Taper: Motorcycle

Distributeur:

UGS: 56673

Mots clés: 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 DT125 DT125R Marine Motorcycle Sterndrive Yamaha

Variantes de produits

Description

The DT125R, produced from 1988 to 2002, is a robust and versatile dual-sport motorcycle renowned for its off-road capability and enduring reliability. Building on a rich heritage in motorcycle manufacturing, the DT125R offers a balance of performance and practical usability, making it a favored choice for recreational trail riding and light commuting. Its engineering prioritizes durability and ease of maintenance, reflecting a commitment to quality. This comprehensive workshop service manual provides in-depth information for the DT125R, covering all essential maintenance, repair, and diagnostic procedures. It details the engine, fuel system, transmission, clutch, suspension, brakes, and electrical system, along with frame and bodywork. Included are routine maintenance schedules, step-by-step repair instructions, troubleshooting guides, and detailed wiring diagrams, making it an indispensable resource for professional technicians and dedicated DIY enthusiasts alike.

🏷️ Basic Information

Identification

Make:

Yamaha

Model:

DT125

Model Variant:

DT125R

Year Range Covered:

1988-2002

Codes

Vin Code Start Year:

Vin Code End Year:

👋 Introduction

Market Position

Target Audience:

Professional technicians and advanced DIY enthusiasts.

Historical Context:

The DT125R falls into the category of lightweight, off-road capable dual-sport motorcycles, popular for trail riding, light commuting, and general recreational use during its production era.

Competitive Analysis

Manual Advantage:

Comprehensive coverage for an extended model range, instant PDF download.

Key Features

Delivery Method:

Instant Download, no shipping costs or waiting.

Content Source:

Original Factory Service Manual, containing accurate and complete information.

Usability:

Printable sections for workshop use, easy to navigate and understand.

📋 Manual Details

Coverage Areas

Manual Type:

Workshop Service Manual / Repair Manual

Language:

English

Format:

PDF Download

Page Count

Estimated Page Count:

Hundreds (typical for comprehensive factory service manuals)

📖 Manual Coverage

Systems Covered

Engine:

Complete overhaul, disassembly, assembly, tuning, lubrication, cooling system.

Fuel System:

Carburetor tuning and overhaul, fuel tank, fuel lines, fuel pump (if applicable).

Transmission:

Gearbox disassembly, assembly, inspection, maintenance, oil specifications.

Clutch:

Clutch operation, adjustment, inspection, replacement.

Suspension:

Front fork overhaul, rear shock absorber servicing, linkage maintenance.

Brakes:

Front and rear brake system service, hydraulic components, pad replacement, bleeding.

Electrical System:

Ignition system, lighting, battery, charging system, wiring diagrams.

Cooling System:

Air cooling system checks and maintenance.

Frame And Bodywork:

Frame inspection, body panel removal and installation, seat, handlebars.

Wheels And Tires:

Wheel bearing service, tire pressure, rim maintenance.

Exhaust System:

Exhaust pipe and silencer maintenance, repacking.

Chassis:

Frame integrity checks, steering head bearing maintenance.

Procedures Included

Routine Maintenance:

Periodic maintenance charts, lubrication, chain adjustment, filter replacement.

Repair Instructions:

Step-by-step repair procedures for all major components.

Troubleshooting:

Diagnostic information and common problem solutions.

Overhaul Procedures:

Detailed instructions for complete engine and component rebuilds.

Wiring Diagrams:

Comprehensive electrical system wiring schematics.

Diagnostic Guides:

Troubleshooting tables and diagnostic flowcharts for common issues.

Technical Depth

Depth Level:

Professional technician level, suitable for DIY mechanics.

📊 Manual Specifications

File Format

File Format:

Print Quality

Printable:

Zoom Functionality:

Binding Type

Binding Type:

N/A (Digital Download)

Paper Type

Paper Type:

N/A (Digital Download)

Compatibility

Operating Systems:

Compatible with all versions of Windows & Mac.

Requirements

Software Requirements:

Adobe PDF Reader & WinRAR.

⚙️ Engine Specifications

Primary Engine

Engine Type:

2-stroke, single-cylinder, reed-valve induction

Displacement:

124cc

Bore X Stroke:

56.4 mm x 50.0 mm (typical for this era DT125)

Compression Ratio:

Approximately 7.1:1 (can vary by specific model/tuning)

Performance

Horsepower:

Approx. 17-20 HP (varies by market and tuning, peak power typically around 7500-8000 RPM)

Torque:

Approx. 1.5-1.7 kgf-m (around 14-17 Nm) at 6500-7000 RPM

Fuel System

Carburetor Type:

Mikuni VM28SS or similar (specific model may vary slightly)

Fuel Type:

Unleaded gasoline (minimum 91 RON recommended)

Oil Mixture:

Pre-mix 2-stroke oil in fuel or Autolube system (check manual for specific ratio/system)

Ignition

Ignition System:

CDI (Capacitor Discharge Ignition)

Engine Features

Power Valve System:

Yamaha Power Valve System (YPVS) for improved low-end torque and top-end power delivery (on many models).

🔧 Transmission

Standard

Transmission Type:

6-speed constant mesh

Clutch Type:

Wet, multi-plate

Optional

Optional Transmission:

Features

Final Drive:

Chain drive

📐 Dimensions

Exterior

Length:

Approx. 2130 mm

Width:

Approx. 825 mm

Height:

Approx. 1180 mm

Wheelbase:

Approx. 1390 mm

Weights

Dry Weight:

Approx. 110-115 kg (varies slightly by model year)

Fuel Tank Capacity:

Approx. 10.0 Liters

🛡️ Safety Features

Ratings

Safety Ratings:

N/A (Motorcycle - individual country regulations apply)

Active Features

Front Brake:

Disc brake

Rear Brake:

Drum brake (some later models may have disc)

Passive Features

Lighting:

Headlight, taillight, brake light, turn signals.

💡 Technology Features

Infotainment

Infotainment System:

N/A (Basic instrumentation: speedometer, odometer, neutral indicator, high-beam indicator).

Driver Assistance

Driver Assistance Features:

Connectivity

Connectivity Options:

🔧 Maintenance

Service Intervals

Oil Change Interval:

Refer to manual; typically every 2000-3000 km or annually for transmission oil.

Spark Plug Replacement:

Refer to manual; typically every 3000-5000 km.

Air Filter Cleaning:

Regular checks, clean/replace every 2000-4000 km depending on usage.

Fluid Specifications

Transmission Oil:

Yamalube Gear Oil 10W-30 or equivalent API GL-4 specification.

Brake Fluid:

DOT 3 or DOT 4 brake fluid (confirm with manual for specific requirements).

Engine Oil Type:

2-stroke engine oil (e.g., Yamalube 2R or equivalent API TC, JASO FD, ISO EGD rated).

Known Issues

Common Wear Items:

Clutch plates, piston rings, exhaust packing, swingarm bushings, kickstart mechanism.

Carburetor Tuning:

Can be sensitive to altitude and temperature changes; requires periodic adjustment for optimal performance.

Power Valve:

The mechanical power valve (YPVS on some models) can require cleaning and lubrication to ensure proper operation.

📚 Vehicle History

Brand Heritage

Yamaha Heritage:

Yamaha Motor Corporation is a renowned Japanese manufacturer known for its wide range of motorcycles, marine products, and musical instruments. Established in 1955, Yamaha has a long history of innovation and performance.

Model Evolution

Dt Series Legacy:

The DT series has a long-standing reputation as a robust and capable dual-sport motorcycle, known for its off-road prowess and reliability.

Production

Production Period:

The DT125R was a popular model produced for a significant period, with updates and variations over its lifespan from 1988 to 2002.

🏆 Awards & Recognition

Recognitions

Model Recognition:

The DT125R is recognized for its durability, off-road capability, and accessible performance, making it a popular choice for recreational riding and commuting.