🏷️ Basic Information Identification Make: Yamaha Model: DT125RE, DT125X Model Variations Covered: DT125RE, DT125X Years Covered: 2002, 2003, 2004, 2005, 2006, 2007, 2008 Codes Chassis Codes: Likely 5FW for RE, 5VR for X (common for the era, specific confirmation requires manual access) 👋 Introduction Market Position Target Audience: Yamaha DT125RE and DT125X owners, independent repair shops, enthusiast mechanics. Competitive Analysis Value Proposition: Provides professional-grade repair and maintenance information, saving owners significant costs compared to dealership service. Key Features Accessibility: Instant download eliminates shipping costs and waiting times. Documentation Standard: Matches the detail and accuracy found in factory service manuals. 📋 Manual Details Coverage Areas Scope Of Coverage: Comprehensive service, repair, maintenance, diagnostics, restoration Page Count Estimated Page Count: High (typically 300-500+ pages for full service manuals of this type, specific count not provided) Manual Type Type: Full Service Repair Manual Language Language: English Format File Format: PDF Delivery Method: Instant Download Compatibility: All Windows versions, Mac, Printable Requirements: Adobe PDF Reader, WinRAR 📖 Manual Coverage Systems Covered Engine Mechanical: Engine assembly, disassembly, cylinder head, piston, crankshaft, connecting rod, lubrication system, cooling system (if applicable), cylinder block. Fuel System: Carburetor (Mikuni VM series typical), fuel tank, fuel lines, fuel pump (if equipped), air filter. Ignition System: CDI ignition, spark plug, ignition coil, stator, rotor, wiring. Exhaust System: Exhaust pipe, muffler, emissions control (if applicable). Transmission Drivetrain: Clutch operation, gearbox (6-speed manual typical), gear shift mechanism, final drive (chain). Suspension: Front forks (conventional or USD depending on variant), rear monoshock or twin shock absorber, linkages, swingarm. Brakes: Front disc brake, rear disc or drum brake (depending on model variant), hydraulic system, caliper, master cylinder, brake fluid specifications. Wheels Tires: Wheel bearing, spokes, rim maintenance, tire types, inflation pressures. Electrical System: Wiring diagrams, battery, charging system (alternator/stator), lighting (headlight, taillight, indicators), horn, starter (if electric start equipped), instrument cluster. Frame Bodywork: Frame inspection, body panel removal/installation, seat, fuel tank, fenders, handlebars, controls. Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, chain adjustment, brake bleeding, spark plug replacement, carburetor cleaning/adjustment. Troubleshooting: Diagnostic procedures for common issues, electrical system troubleshooting, engine performance problems, starting difficulties. Repair: Detailed step-by-step repair instructions for all major components and systems, including engine rebuilds, suspension overhaul, brake system repairs. Diagnostics: Systematic diagnostic approaches, electrical testing with multimeter, fault finding for ignition and fuel systems. Technical Depth Depth: Full factory-level detail, suitable for professional technicians and advanced DIY mechanics. Illustrations: Detailed illustrations, drawings, and photos for each procedure. Instructions Format: Numbered steps, notes, cautions, warnings, bold figure numbers for easy reference. 📊 Manual Specifications File Format Quality: PDF, Full Printable Print Quality Printability: All pages are printable. Binding Type Binding Type: Digital (PDF download) Paper Type Paper Type: Not Applicable (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: 2-stroke, liquid-cooled, single-cylinder Displacement: 124 cc (approximate) Bore X Stroke: Typically around 56.0 mm x 50.7 mm (verify with manual) Compression Ratio: Likely around 7.0:1 - 8.5:1 (verify with manual) Performance Horsepower: Approximately 15-20 HP (varies by market and specific model tune, verify with manual) Torque: Approximately 1.2-1.5 kg-m or 12-15 Nm (verify with manual) Fuel System Carburetor Type: Mikuni VM28 or similar (confirm specific model) Fuel Type: Unleaded gasoline with appropriate 2-stroke oil pre-mix or autolube system Lubrication Lubrication Type: Autolube (oil injection system) or pre-mix (verify specific model) 🔧 Transmission Standard Type: 6-speed constant mesh, sequential Clutch Type: Wet, multi-disc, cable-operated Features Gear Ratios: Specific ratios available within the manual 📐 Dimensions Exterior Wheelbase: Approximately 1390 mm (verify with manual) Weights Curb Weight: Approximately 110-125 kg (verify with manual) Fuel Capacity: Approximately 10-12 liters (verify with manual) 🛡️ Safety Features Ratings Safety Features Coverage: Manual covers inspection and maintenance of safety systems like brakes and lighting. Active Features Brakes: Front hydraulic disc, Rear disc (RE) or Drum (X variant often had drum, verify). 💡 Technology Features Infotainment Instrument Cluster: Analog speedometer, tachometer, odometer, trip meter, indicator lights (turn signals, high beam, neutral). Manual details diagnostics. Driver Assistance Assistance Features: N/A (This is a motorcycle, typically no advanced electronic driver assistance systems). Connectivity Connectivity Features: N/A 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 3,000-5,000 km or annually (verify specific interval in manual) Spark Plug Replacement: Recommended at 5,000-10,000 km or based on inspection (verify) Chain Lubrication Adjustment: Regular checks, lubricate every 500-1000 km, adjust chain slack as per manual. Fluid Specifications Engine Oil: 2-stroke engine oil, JASO FD or higher specification (verify type and viscosity) Brake Fluid: DOT 3 or DOT 4 brake fluid (verify specific requirement) Coolant: For liquid-cooled models, a 50/50 mix of ethylene glycol coolant and distilled water (verify) Known Issues Common Problems: Carburetor jetting issues, exhaust valve operation (if equipped), fork seal leaks, electrical connector corrosion (typical for older bikes). Manual provides solutions. 📚 Vehicle History Brand Heritage Yamaha Legacy: Yamaha has a long-standing...