🏷️ Basic Information Identification Make: Yamaha Model: DT125 Model Variant: DT125RE, DT125X Model Years Covered: 2002, 2003, 2004, 2005, 2006, 2007, 2008 Codes Chassis Codes: DT125RE (e.g., 5FW1, 5FW2), DT125X (e.g., 4SP1) 👋 Introduction Market Position Target Audience: Yamaha DT125RE/DT125X owners, independent repair shops, motorcycle mechanics Competitive Analysis Value Proposition: Provides dealership-level service information, enabling cost savings on maintenance and repairs, and empowering owners with knowledge. Key Features Features: Step-by-step instructions, detailed diagrams, illustrations, wiring schematics, comprehensive specifications, troubleshooting guide 📋 Manual Details Coverage Areas Primary Coverage: Comprehensive service, repair, and maintenance for Yamaha DT125RE and DT125X models Page Count Estimated Page Count: Likely 300+ pages (typical for comprehensive service manuals) Manual Type Type: Service Repair Workshop Manual Language Language: English Format Format: PDF Download Compatibility: Compatible with all versions of Windows and Mac OS Viewing Requirements: Adobe PDF Reader Download Speed: Fast Download Manual Specifications File Format Details: High-resolution PDF with searchable text and embedded images/diagrams Print Quality: Printable pages allowing for individual section printing Binding Type: N/A (Digital Download - PDF) Paper Type: N/A (Digital Download - PDF) 📖 Manual Coverage Systems Covered Engine: Engine specifications, removal/installation, internal components, troubleshooting Fuel System: Carburetor (settings, cleaning, repair), fuel lines, fuel tank Cooling System: Radiator, coolant, hoses, water pump Transmission: Gearbox operation, removal, installation, internal components, maintenance Drive Train: Drive chain, sprockets (maintenance, replacement) Electrical System: Ignition system, lighting, battery, charging system, wiring diagrams, troubleshooting Suspension: Front forks, rear shock absorbers (maintenance, adjustment, repair) Brakes: Front and rear brake systems (discs, calipers, master cylinders, bleeding, adjustments) Steering System: Handlebars, steering stem, bearings (maintenance, adjustment) Body Work: Fairings, seat, fenders, plastics (removal, installation, care) Intake Exhaust: Airbox, exhaust system (maintenance, inspection) Procedures Included Routine Maintenance: Oil changes, filter replacements, chain adjustments, bolt torquing, general inspections Periodic Checks Adjustments: Valve clearance (if applicable to 2-stroke), clutch, throttle, brake lever adjustments Troubleshooting: Diagnostic procedures for common and advanced issues Repair: Step-by-step instructions for component repair and replacement Disassembly Reassembly: Detailed procedures for major component removal and installation Technical Depth Depth: Complete workshop level (suitable for professional technicians and experienced DIYers) Manual Specifications Included Diagrams: Detailed exploded views and assembly diagrams for all major components Included Schematics: Complete electrical wiring diagrams for the entire motorcycle ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, 2-stroke, reed valve induction Bore X Stroke: 56.5 mm x 50.7 mm (Typical for DT125R/RE, confirm for X variant) Displacement: 124 cc Compression Ratio: Approximately 7.2:1 (check specific model for exact) Performance Horsepower: Approx. 23-26 HP (Varies by market and specific model variant, e.g., RE vs. X) Torque: Approx. 20-22 Nm (Varies by market and specific model variant) Fuel System Carburetor Model: Mikuni VM28 (Typical for DT125RE, confirm for X variant) Fuel Type: Unleaded gasoline (Octane rating as specified in manual) Oil Mixture: Pre-mix or Autolube system (as specified by Yamaha) 🔧 Transmission Standard Type: 6-speed constant mesh Optional N/A: N/A Features Clutch Type: Wet, multiple-disc Transmission Oil Type: Yamalube 2-stroke oil or equivalent (Specific grade listed in manual) 📐 Dimensions Exterior Overall Length: Approx. 2,150 mm (Varies slightly between RE and X) Overall Width: Approx. 800-830 mm Overall Height: Approx. 1,210-1,225 mm Weights Dry Weight: Approx. 128-133 kg Fuel Tank Capacity: Approx. 10 Liters Wheels Tires Front Tire Size: 80/90-21 48P (Typical for RE, X may differ) Rear Tire Size: 110/80-18 58P (Typical for RE, X may differ) 🛡️ Safety Features Ratings N/A: N/A (Motorcycle safety ratings typically not published in the same manner as cars) Active Features Brakes: Disc brakes (Front and Rear) Passive Features Lighting: Headlight, taillight, brake lights, turn signals 💡 Technology Features Infotainment N/A: N/A (Basic instrumentation typical for this era of dual-sport motorcycle) Driver Assistance N/A: N/A Connectivity N/A: N/A 🔧 Maintenance Service Intervals Engine Oil Change: Every 3,000-5,000 km or annually (Consult manual for precise interval and oil type) Spark Plug Inspection: Every 2,000-3,000 km Air Filter Cleaning: Every 2,000-4,000 km (more frequently in dusty conditions) Drive Chain Lubrication Adjustment: Every 500-1,000 km or after washing/wet riding Fluid Specifications Engine Oil: Yamalube 2-stroke oil or API TC, JASO FD/FC certified synthetic 2-stroke oil (Check manual for specific recommendations) Coolant: Yamaha Coolant or equivalent ethylene glycol-based antifreeze with distilled water (50/50 mix) Brake Fluid: DOT 4 Known Issues Carburetor Tuning: Can require periodic adjustment due to fuel variability or wear. Yamaha manual provides detailed tuning procedures. Exhaust Valve Cleaning: Carbon buildup on the exhaust power valve can affect performance and may require periodic cleaning as per manual instructions. Suspension Seals: Front fork seals can wear over time, requiring replacement. Manual details fork oil levels and seal replacement. 📚 Vehicle History Brand Heritage Yamaha Motorsport: Yamaha has a rich history in motorcycle racing and off-road performance, consistently innovating in engine technology and chassis design. Model Evolution Dt Series Legacy: The DT series is renowned for its...