This manual covers the DT125 and DT125R models produced between 1988 and 2002. These versatile dual-sport motorcycles are known for their robust engineering, reliability, and capability in both on-road and off-road environments. Building on a strong heritage in performance motorcycles, the DT series, including the DT125R, has consistently offered riders a durable and dependable machine suitable for a wide range of riding conditions and adventures. This comprehensive English-language service manual provides detailed information for full service, repair, maintenance, and restoration. It is an essential resource for professional technicians and DIY mechanics alike, offering step-by-step instructions, troubleshooting guides, diagnostic procedures, and detailed wiring diagrams. The manual covers all major systems, including the engine, transmission, electrical system, fuel system, chassis, and brakes, ensuring that owners and technicians have the knowledge required to maintain and repair these models effectively. 🏷️ Basic Information Identification Make: Yamaha Model: DT125 / DT125R Product Name: Yamaha DT125 DT125R 1988-2002 Full Service Repair Manual PDF Download Codes Model Years Covered: 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 👋 Introduction Market Position Positioning: Essential resource for owners and technicians of Yamaha DT125/DT125R models from 1988-2002, providing comprehensive repair and maintenance information. Competitive Analysis Advantage: Offers a digital, instantly accessible format, eliminating shipping costs and wait times compared to physical manuals. Key Features Ease Of Use: Numbered instructions, bold figure numbers, and a detailed table of contents facilitate quick information retrieval. Visual Guidance: Includes detailed illustrations, drawings, photos, and enlarged inset views for clarity. Content Quality: Provides information equivalent to that used by professional technicians. 📋 Manual Details Coverage Areas Primary Coverage: Full service, repair, maintenance, rebuild, refurbishment, restoration Target Audience: Professional technicians, DIY mechanics Page Count Estimated Page Count: Highly detailed, extensive (specific count not provided, but implied to be comprehensive) Manual Type Type: Full Service Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Service: Complete engine overhaul, troubleshooting, diagnostics, component repair Transmission Service: Gearbox inspection, repair, and maintenance Electrical System: Detailed wiring diagrams, troubleshooting, diagnostics, component testing Fuel System: Carburetor tuning, fuel delivery system maintenance Cooling System: Radiator, hoses, coolant specifications and maintenance (if applicable to specific models) Chassis And Suspension: Fork, rear shock, swingarm, frame inspection and repair Braking System: Front and rear brake maintenance, bleeding, component replacement Exhaust System: Exhaust pipe and muffler inspection and maintenance Bodywork And Trim: Fairing, seat, tank removal and installation, cosmetic repairs Procedures Included Maintenance Procedures: Routine service, lubrication, filter changes, spark plug replacement Repair Procedures: Step-by-step instructions for all major and minor repairs Troubleshooting Guides: Diagnostic procedures for common and uncommon issues Diagnostics: Comprehensive diagnostic flowcharts and tests Rebuild Procedures: Detailed instructions for engine, transmission, and suspension rebuilds Wiring Diagrams: Complete and detailed electrical schematics Technical Depth Depth: Advanced diagnostics, complete engine rebuilds, electrical system troubleshooting, chassis overhauls 📊 Manual Specifications File Format Format: PDF Requirements: Adobe PDF Reader, WinRAR Compatibility: All Versions of Windows & Mac Print Quality Printability: Full Printable Digital Storage: Save to hard-drive, burn to CD-ROM Binding Type Binding Type: Digital Download (No physical binding) Paper Type Paper Type: N/A (Digital format) ⚙️ Engine Specifications Primary Engine Engine Type: 2-stroke, liquid-cooled (typical for DT125R, specific variants may exist) Displacement: 124cc (for DT125R, variations may exist across the model run) Performance Horsepower: Varies by year and specific model variant; typically in the 15-25 HP range. Torque: Specific figures vary by model year and tuning; indicative of a torquey, tractable engine for its class. Fuel System Carburetor: Mikuni VM series (common for this era and model, specific size varies by year). Fuel Type: Unleaded gasoline with 2-stroke oil pre-mix (or oil injection system, depending on specific model variant). Ignition System Type: CDI (Capacitor Discharge Ignition) Lubrication System: Yamaha Autolube (oil injection system) or pre-mix, depending on the specific model variant. 🔧 Transmission Standard Type: 6-speed constant mesh Features Clutch: Wet, multiple-disc Final Drive: Chain drive Fluid Requirements Transmission Oil: Yamalube 2-stroke oil (for Autolube system) or specified gear oil for the gearbox (manual will specify exact type and capacity). 📐 Dimensions Exterior Length: Varies by specific model year and configuration (typically around 2000-2100 mm) Width: Varies (typically around 800-850 mm) Height: Varies (typically around 1150-1200 mm) Weights Dry Weight: Approximately 105-115 kg (varies by specific model year and equipment) Wet Weight: Approximately 115-125 kg (with fluids, varies) Fuel Capacity: Approximately 10-12 liters (including reserve, varies by year) 🛡️ Safety Features Ratings Safety Features: Reflective elements, brake lights, turn signals (standard for street-legal models). Active Features Braking System: Front: Disc brake; Rear: Drum brake (common configuration, some later models may have rear disc). Passive Features Frame Construction: Steel semi-double cradle frame (typical for durability and rigidity). 💡 Technology Features Infotainment Features: Basic analog instrumentation: speedometer, tachometer, odometer, indicator lights. Driver Assistance Features: N/A (Designed...