Yamaha DT125 DT125R 1987 1988 Factory Service Repair Manual

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This manual covers the DT125R, produced for the 1987 and 1988 model years. The DT125R is a testament to heritage in crafting reliable and capable dual-sport motorcycles, building on a...

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类型: Motorcycle

斯库: 62313

标签: 1987 1988 DT125 DT125R Marine Motorcycle Sterndrive Yamaha

产品多属性

Description

This manual covers the DT125R, produced for the 1987 and 1988 model years. The DT125R is a testament to heritage in crafting reliable and capable dual-sport motorcycles, building on a lineage that dates back decades. Known for its robust two-stroke engine, the DT125R offers a blend of off-road prowess and on-road usability, making it a popular choice for riders seeking adventure and versatility. Its engineering quality and performance characteristics defined a generation of dual-sport machines, solidifying reputation in this segment. This comprehensive factory service repair manual provides in-depth technical knowledge essential for owners and independent repair shops. It details routine maintenance, troubleshooting, and repair procedures for all major systems, including the engine, fuel system, cooling system, drivetrain, chassis, and electrical components. With hundreds of pages of detailed illustrations, diagrams, and specifications, this English-language manual empowers users to perform everything from basic upkeep to complete engine rebuilds, ensuring the longevity and optimal performance of their DT125R.

🏷️ Basic Information

Identification

Make:

Yamaha

Model:

DT125

Model Variant:

DT125R

Year:

1987-1988

Codes

Vin Decoder Reference:

Refer to manual for VIN specifics

👋 Introduction

Market Position

Target Audience:

Yamaha DT125R owners and independent repair shops seeking comprehensive, factory-authorized service information.

Competitive Analysis

Value Proposition:

Provides the same in-depth technical knowledge as professionals, enabling informed maintenance, repair, and cost savings.

Key Features

Format Advantage:

Digital PDF format allows for easy searching, printing of specific pages, and avoidance of physical manual wear and tear.

Content Quality:

Includes hundreds of pages with detailed illustrations, diagrams, photos, and specifications.

📋 Manual Details

Coverage Areas

Covered Models:

Yamaha DT125R (all styles covered)

Covered Years:

1987, 1988

Page Count

Estimated Pages:

Hundreds

Manual Type

Type:

Factory Service Repair Manual

Language

Language:

English

Format

Format:

PDF Download

📖 Manual Coverage

Systems Covered

Engine:

General Information, Engine Top End, Engine Lubrication System, Crankshaft/Transmission

Fuel System:

Fuel System

Cooling System:

Cooling System

Drivetrain:

Clutch, Engine Removal/Installation, Crankshaft/Transmission, Final Drive

Chassis:

Wheels/Tires, Brakes, Suspension, Steering, Frame

Electrical:

Electrical System, Wiring Diagrams

Miscellaneous:

Appendix

Procedures Included

Maintenance:

Routine maintenance, fluid checks, component lubrication

Troubleshooting:

Engine fault symptom diagnosis, advanced troubleshooting guide

Repair:

Step-by-step repair procedures for all covered systems, component replacement

Diagnostics:

Engine management system analysis, electrical system diagnostics, part testing techniques

Rebuild:

Complete engine rebuild, transmission overhaul

Technical Advice:

Mechanic tips, advice for owners on interacting with service professionals

Technical Depth

Depth:

Comprehensive factory-level detail for professional technicians and advanced DIY mechanics.

📊 Manual Specifications

File Format

Format:

Compatibility:

Windows, macOS, Linux (requires Adobe PDF Reader)

Print Quality

Printability:

Printable without restriction (individual pages or entire manual)

Resolution:

High quality, suitable for clear printing of diagrams and text.

Binding Type

Binding:

Digital Download (user printable, can be bound or stored electronically)

Paper Type

Paper Type Recommendation:

Standard copy paper for printing, heavier stock recommended for frequently referenced sections.

⚙️ Engine Specifications

Primary Engine

Type:

2-stroke, single-cylinder, reed valve induction

Displacement:

124 cc (approximately)

Bore X Stroke:

Refer to manual for precise specifications

Cooling:

Liquid-cooled (typically with a radiator)

Performance

Horsepower:

Refer to manual for specific model year output (typically around 15-20 HP)

Torque:

Refer to manual for specific model year output

Fuel System

Carburetor Type:

Mikuni VM series (specific model number in manual)

Fuel Type:

Unleaded gasoline (refer to manual for octane rating)

Fuel Mixture:

2-stroke oil/gasoline mix (specific ratio and oil type in manual)

🔧 Transmission

Standard

Type:

6-speed constant mesh, return shift

Features

Clutch:

Wet, multi-plate

Gear Ratios:

Detailed in manual

Transmission Oil:

Yamalube (specific grade and capacity in manual)

📐 Dimensions

Exterior

Overall Length:

Refer to manual

Overall Width:

Refer to manual

Overall Height:

Refer to manual

Weights

Dry Weight:

Refer to manual (typically around 110-120 kg)

Wet Weight:

Refer to manual

🛡️ Safety Features

Ratings

Safety Certification:

Refer to regional homologation documents

Active Features

Braking System:

Front: Disc brake; Rear: Drum brake (or Disc on some R models - verify with manual)

Suspension Front:

Telescopic fork

Suspension Rear:

Monocross suspension

💡 Technology Features

Infotainment

Features:

Basic analog instrument cluster (speedometer, tachometer, odometer, indicators).

Driver Assistance

Features:

Connectivity

Features:

🔧 Maintenance

Service Intervals

Oil Change Transmission:

Refer to manual for specific mileage/time intervals (e.g., every 3000-5000 km)

Spark Plug Check Replace:

Refer to manual (typically every 1000-2000 km)

Air Filter Cleaning:

Refer to manual (frequency dependent on operating conditions)

Fluid Specifications

Engine Oil Mix:

Yamalube 2-stroke oil or equivalent (100% synthetic recommended) at specified ratio (e.g., 20:1 or 30:1)

Transmission Oil:

Yamalube Gear Oil (GL-4 80W or 90W) or equivalent

Coolant:

Ethylene glycol-based antifreeze/coolant (50% mixture with distilled water)

Known Issues

Common Wear Items:

Piston rings, clutch plates, exhaust packing, bearings (e.g., swingarm, wheel, steering stem)

Carburetion Issues:

Clogged jets, worn needle/seat due to fuel quality or age

Power Valve Operation:

Carbon buildup affecting operation, requiring cleaning

Technical Specifications

Ignition Timing:

Refer to manual (critical for 2-stroke performance)

Valve Clearance:

N/A (2-stroke engine)

📚 Vehicle History

Brand Heritage

Heritage:

Yamaha's long history in off-road and dual-sport motorcycles, known for reliable and capable two-stroke engines.

Model Evolution

Evolution:

The DT series has a lineage dating back to the 1960s, evolving into more performance-oriented and off-road capable models like the DT125R.

Production

Manufacturing Era:

Late 1980s, a period of refinement for Japanese dual-sport motorcycles.

🏆 Awards & Recognition

Recognitions

Model Specific Awards:

The DT series was well-regarded in its era for its performance and off-road capability, contributing to Yamaha's reputation in dual-sport.