🏷️ Basic Information Identification Make: Yamaha Model: DT125R Generation: DT125R (3FW) Production Years Covered: 1988-2002 👋 Introduction Market Position Target Audience: Yamaha DT125R owners, DIY mechanics, restoration enthusiasts Competitive Analysis Value Proposition: Provides professional-level repair knowledge, enabling significant cost savings on labor ($50-$60/hour) Key Features Completeness: Covers every detail for repair, maintenance, rebuilding, refurbishing, and restoration Ease Of Use: User-friendly navigation, printable pages, numbered instructions, clear illustrations Authenticity: Actual Genuine Factory Service Manual 📋 Manual Details Coverage Areas Primary Coverage: Complete Factory Service & Repair Diagnostic Coverage: Engine Fault Diagnosis, Electrical System Troubleshooting Maintenance Coverage: Routine Maintenance, Scheduled Service Repair Coverage: Step-by-step repair procedures for all major components Tuning Coverage: Engine Tuning and Performance Adjustments Wiring Diagrams: Detailed Electrical Wiring Diagrams Page Count Estimated Pages: Hundreds of pages (actual number not specified, but implied comprehensive) Manual Type Type: Official Factory Service Repair Manual Origin: Genuine Factory Manuals (Not 3rd Party) Language Language: English Format Delivery Format: PDF Download File Format: PDF Compatibility: Windows and Mac OS Portability: Printable (entire manual or selected pages) Searchability: Searchable PDF (allows quick information retrieval) 📖 Manual Coverage Systems Covered General Information: Included Fuel System: Included (Carburetor, fuel lines, fuel tank) Cooling System: Included (if applicable to the DT125R variants within the year range) Engine Top End: Included (Cylinder, piston, cylinder head, exhaust valve timing if applicable) Clutch: Included (Clutch operation, maintenance, adjustment) Engine Lubrication: Included (Oil injection system, oil pump) Engine Removal Installation: Included (Detailed procedures) Crankshaft Transmission: Included (Gearbox, crankshaft, bearings, seals) Wheels Tires: Included (Wheel bearing maintenance, tire changes, wheel balancing) Final Drive: Included (Chain and sprockets maintenance, adjustment) Brakes: Included (Front and rear brake systems, hydraulic/mechanical, fluid replacement) Suspension: Included (Front forks, rear shock absorber, linkage maintenance) Steering: Included (Handlebar, steering stem, bearings) Frame: Included (Chassis inspection, maintenance) Electrical System: Included (Ignition, lighting, charging system, battery, wiring harnesses) Appendix: Included (Potentially for specifications or reference data) Procedures Included Troubleshooting: Advanced troubleshooting guide for common and complex issues Diagnostics: Engine fault symptom diagnosis, part testing techniques Routine Maintenance: Oil changes, filter replacements, chain lubrication, general checks Component Rebuild: Engine top-end rebuild, transmission overhaul, suspension fork rebuild Electrical Repair: Wiring harness repair, component testing, diagnostic procedures Assembly Disassembly: Step-by-step guides for engine, chassis, and component removal/installation Technical Advice: Tips for owner-mechanic communication, identifying quality work Technical Depth Depth: Comprehensive Factory Level (suitable for technicians and advanced DIYers) Detail Level: Detailed substeps, notes, cautions, warnings, numbered instructions Illustrations: Detailed illustrations, drawings, and photos Illustrations Detail: Enlarged inset views for critical component examination 📊 Manual Specifications File Format Quality: High Resolution Print Quality Printability: Fully Printable (unrestricted) Binding Type Binding: N/A (Digital PDF Download) Paper Type Paper Type: N/A (Digital PDF Download) ⚙️ Engine Specifications Primary Engine Engine Type: 2-stroke, Single Cylinder, Reed Valve Induction, YPVS (Yamaha Power Valve System) - Common for many DT125R models Displacement: Approximately 123-124cc (specific variant dependent) Cooling: Liquid-cooled (typical for DT125R, though air-cooled variants might exist in early years) Performance Horsepower: Typically in the range of 20-26 HP depending on year and specific tuning (manual will detail exact specs) Torque: Varies, but typically around 1.7-2.0 kgf-m (manual will provide precise figures) Fuel System Carburetor: Mikuni VM24 or similar (manual will specify exact model and jetting) Fuel Type: Unleaded gasoline, typically with 2-stroke oil premix (or via autolube system) 🔧 Transmission Standard Transmission Type: 6-speed constant mesh Optional Optional Transmission: N/A (Standard for the model) Features Clutch Type: Wet, multi-plate 📐 Dimensions Exterior Length: Varies by specific sub-model, but typically around 2100-2200 mm Width: Varies by specific sub-model, but typically around 770-850 mm Height: Varies by specific sub-model, but typically around 1150-1250 mm Weights Dry Weight: Approximately 110-120 kg (depending on model variant and equipment) 🛡️ Safety Features Ratings Safety Ratings: N/A (Motorcycle, not subject to automotive crash ratings) Active Features Braking System: Disc brakes front and rear (typically hydraulic) Passive Features Lighting: Headlight, taillight, brake lights, turn signals (compliant with local regulations) 💡 Technology Features Infotainment Infotainment System: N/A (This is a vintage dual-sport motorcycle, focused on mechanicals and basic electricals) Driver Assistance Driver Assistance Features: N/A (Motorcycle, no electronic driver assistance systems) Connectivity Connectivity Options: N/A (No onboard computer or connectivity features) 🔧 Maintenance Service Intervals Oil Change Interval: Refer to manual for specific intervals based on usage, typically every 1000-2000 km for engine oil (if separate from premix) Spark Plug Replacement: Check and clean/replace as per manual recommendations, often around 3000-6000 km Air Filter Cleaning: Regular inspection and cleaning (e.g., every 1000-2000 km), replacement as needed. Chain Maintenance: Lubricate and adjust chain tension every 500-1000 km or as needed. Fluid Specifications Engine Oil Type: Yamaha recommends specific 2-stroke oils (e.g., Yamalube 2M or equivalent API TC, JASO FD rated oil for autolube; or for premix, a high-quality 2-stroke oil in the specified ratio). Coolant Type: Ethylene glycol-based...