🏷️ Basic Information Identification Make: Yamaha Model: DT125 Model Variant: DT125R Year Range Covered: 1988-2002 Codes Vin Code Start Year: 1988 Vin Code End Year: 2002 👋 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: PDF Print Quality Printable: Yes Zoom Functionality: Yes 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: N/A 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: N/A Connectivity Connectivity Options: N/A 🔧 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...