The Yamaha DT125RE is a robust dual-sport motorcycle, produced from 2004 to 2007, celebrated for its off-road capability and reliable two-stroke engine. This model is part of a respected lineage, known for its durability and versatility, making it suitable for light trail riding and everyday commuting. Key features include a lightweight chassis, capable suspension, and a powerful yet efficient 124cc liquid-cooled engine, offering a balanced performance for various terrains. Its design emphasizes practicality and the enduring appeal of a capable dual-sport machine, reflecting extensive heritage in motorcycle manufacturing. This comprehensive workshop service and repair manual provides detailed guidance for the DT125RE models from 2004 to 2007. Covering a wide array of systems, including the engine, fuel, cooling, ignition, transmission, chassis, braking, and electrical systems, this 318-page English manual is an essential resource. It offers step-by-step instructions for routine maintenance, component repair, full engine rebuilds, and technical adjustments, along with clear wiring diagrams for troubleshooting. Designed for professional technicians and owners alike, this manual ensures the optimal performance and longevity of your vehicle through accurate diagnostic procedures and detailed repair information. 🏷️ Basic Information Identification Make: Yamaha Model: DT125RE Model Years Covered: 2004, 2005, 2006, 2007 Codes Product Identifier: Yamaha DT125RE 2004-2007 Repair Service Manual PDF 👋 Introduction Market Position Positioning: A robust dual-sport motorcycle known for its off-road capability and reliable two-stroke engine, popular in its era for light trail riding and commuting. Competitive Analysis Competitors: Competed with other dual-sport motorcycles in the 125cc class from brands like Honda (CRM125), Kawasaki (KDX125), and Suzuki (TS125). Key Features Features: Lightweight chassis, capable suspension, reliable two-stroke power, versatile for on-road and off-road use. 📋 Manual Details Coverage Areas Scope: Comprehensive workshop service and repair Page Count Total Pages: 318 Manual Type Type: Workshop Service Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Complete engine disassembly, assembly, tuning, troubleshooting, and diagnostics. Fuel System: Carburetor inspection, adjustment, cleaning, and repair; fuel tank and lines maintenance. Cooling System: Radiator, hoses, thermostat, and coolant checks and replacement. Ignition System: Spark plug specifications, ignition coil testing, CDI unit diagnostics. Transmission Drivetrain: Clutch operation, gearbox inspection, lubrication, and troubleshooting. Chassis Suspension: Front fork disassembly, servicing, and adjustment; rear shock absorber inspection and replacement. Braking System: Front and rear brake pad replacement, caliper servicing, hydraulic system bleeding, and inspection. Electrical System: Wiring diagrams, lighting system, battery maintenance, charging system testing, and starter motor troubleshooting. Wheels Tires: Tire pressure recommendations, wheel bearing maintenance, spoke tension adjustment. Frame Bodywork: Frame inspection, fairing removal and installation, seat maintenance. Procedures Included Maintenance: Routine servicing, oil changes, filter replacements, lubrication points, chain adjustment. Troubleshooting: Step-by-step diagnostic procedures for common and uncommon issues. Repair: Detailed instructions for component repair and replacement, including full engine rebuilds. Rebuilds: Complete engine, gearbox, and suspension component rebuild procedures. Adjustments: Carburetor, clutch, brake, and suspension adjustments. Wiring Diagrams: Clear and detailed electrical schematics. Technical Depth Depth: Designed for professional technicians, covering detailed diagnostic procedures and complete overhaul instructions. 📊 Manual Specifications File Format Format: PDF Print Quality Quality: High resolution, suitable for printing individual pages or the entire manual. Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Type: 2-stroke, liquid-cooled, reed valve Displacement: 124cc Bore X Stroke: 56.4 mm x 49.1 mm Compression Ratio: 7.4:1 (approx.) Performance Horsepower: Approx. 17-20 HP (depending on market regulations) Torque: Approx. 10-12 lb-ft (depending on market regulations) Fuel System Carburetor: Mikuni VM28 or similar Fuel Type: Unleaded gasoline (min. 91 octane recommended) Oil Mixture: Pre-mix or Autolube (Yamalube 2-stroke oil recommended) 🔧 Transmission Standard Type: 6-speed constant mesh Optional Options: N/A Features Clutch: Wet, multiple-disc Final Drive: Chain drive 📐 Dimensions Exterior Length: Approx. 2070 mm (81.5 in) Width: Approx. 825 mm (32.5 in) Height: Approx. 1170 mm (46.1 in) Wheelbase: Approx. 1380 mm (54.3 in) Weights Dry Weight: Approx. 120 kg (264.6 lbs) Curb Weight: Approx. 127 kg (280 lbs) Fuel Capacity: 10 Liters (2.6 US gal) 🛡️ Safety Features Ratings Safety Standards: Designed to meet relevant motorcycle safety standards of the time. Active Features Brakes: Disc brakes front and rear for effective stopping power. Lighting: Headlight, taillight, and turn signals for visibility. Passive Features Frame Construction: Durable steel frame provides a stable riding platform. 💡 Technology Features Infotainment Features: Basic analog instrumentation including speedometer, odometer, and indicator lights. Driver Assistance Features: N/A (This model predates significant driver-assistance technologies on motorcycles). Connectivity Features: N/A (No onboard connectivity features). 🔧 Maintenance Service Intervals Oil Change: Every 3,000 km (1,800 miles) or annually. Air Filter Cleaning: Every 1,000 km (600 miles), or more frequently in dusty conditions. Spark Plug Check: Every 3,000 km (1,800 miles). Chain Lubrication Adjustment: Every 500 km (300 miles) or after washing/riding in rain. Fluid Specifications Engine Oil: Yamalube 2-stroke oil or equivalent (API TC, JASO...