🏷️ Basic Information Identification Make: Yamaha Model: DT125X Model Series: DT125X Series Chassis Code: Likely DE08, specific to DT125X Generation Generation: First Generation (DT125X) Codes Engine Code General: 125cc 2-stroke 👋 Introduction Market Position Category: Lightweight Dual-Sport / Enduro Motorcycle Target Audience: Enthusiasts and owners seeking comprehensive maintenance and repair guidance. Competitive Analysis Competitors General: Honda CR series, Suzuki RM series, Kawasaki KX series (during similar production eras). Key Features Vehicle Engine Type: 2-stroke, liquid-cooled, single-cylinder Transmission: 6-speed constant mesh Suspension Front: Telescopic forks Suspension Rear: Monoshock (Monocross suspension system) Brakes: Disc brakes front and rear Wheel Size Front: Typically 21-inch Wheel Size Rear: Typically 18-inch Key Features Manual Manual Purpose: To guide mechanical technicians through all aspects of repair and maintenance. Scope: Comprehensive service and repair information. 📋 Manual Details Coverage Areas Covered Years: 2004, 2005, 2006, 2007 Page Count Page Count: 318 Manual Type Manual Type: Workshop Service Manual Language Language: English (presumed primary language based on typical Yamaha service manuals for international markets) Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanical: Complete engine overhaul, disassembly, assembly, torque specifications, cylinder head, piston, connecting rod, crankshaft, lubrication system, cooling system (liquid-cooled). Engine Electrical: Ignition system, CDI unit, stator, spark plug, wiring diagrams, lighting system, charging system, battery. Fuel System: Carburetor (likely Mikuni VM28 or similar), fuel delivery, fuel tank, fuel filter, fuel lines, mixture adjustment. Transmission: 6-speed gearbox, clutch operation, internal components, lubrication, gear shift mechanism. Chassis And Frame: Frame inspection, steering system, headstock bearings, suspension components (front forks, rear shock absorber), swingarm. Braking System: Hydraulic disc brakes (front and rear), brake calipers, master cylinders, brake fluid, bleeding procedures, pad replacement. Wheels And Tires: Wheel bearings, spoke tensioning, tire selection and pressures, rim specifications. Exhaust System: Exhaust pipe, muffler, sealing, maintenance. Cooling System: Radiator, coolant type and capacity, hoses, thermostat operation. Electrical Component Locations: Identification and function of key electrical components. Bodywork And Trim: Panel removal and installation, seat, fenders, fuel tank covers, decals. Procedures Included Routine Maintenance: Oil changes, filter replacements, chain adjustment, lubrication points, spark plug checks, air filter cleaning/replacement. Troubleshooting: Diagnostic procedures for common problems, electrical faults, engine performance issues, starting problems. Repair And Rebuild: Detailed step-by-step instructions for component disassembly, repair, and reassembly. Inspection And Adjustment: Precise instructions for adjusting clutch, throttle, brakes, and other critical components. Torque Specifications: Comprehensive list of torque values for all fasteners. Wiring Diagrams: Detailed electrical schematics for all models and variations. Special Tools: Identification of specific tools required for certain maintenance or repair tasks. Technical Depth Depth: Comprehensive. Covers everything from basic maintenance and owner checks to complete engine and transmission rebuilds, electrical system diagnostics, and frame/suspension work. Suitable for professional technicians and advanced DIY mechanics. 📊 Manual Specifications File Format File Format: PDF Print Quality Print Quality: High Resolution (typically, for digital manuals of this era, ensuring clarity of diagrams and text). Binding Type Binding Type: N/A (Digital PDF format) Paper Type Paper Type: N/A (Digital PDF format) ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, 2-stroke, single-cylinder Displacement: 124 cc (Cubic Centimeters) Bore X Stroke: Approx. 54 mm x 54.5 mm (typical for this engine family) Compression Ratio: Typically around 7.2:1 (or similar for 2-stroke) Power Delivery System: Reed valve induction Performance Horsepower Approx: Approx. 20-25 HP (Varies by region and tuning) Torque Approx: Approx. 15-18 Nm (Varies by region) Fuel System Carburetor Type: Mikuni VM28 (or similar 28mm flat-slide carburetor) is common for this model. Fuel Type: Unleaded gasoline (minimum 90 octane recommended) Fuel Mixture Ratio: 50:1 (Gasoline:2-stroke oil) - Specific oil type to be confirmed in manual. 🔧 Transmission Standard Type: 6-speed constant mesh Clutch Type: Wet, multi-plate Features Gear Ratios: Specific gear ratios are detailed within the manual, crucial for performance tuning. Final Drive: Chain drive 📐 Dimensions Exterior Length Approx: Approx. 2100 mm (dependent on specific configuration) Width Approx: Approx. 800 mm (dependent on specific configuration) Height Approx: Approx. 1200 mm (dependent on specific configuration) Weights Dry Weight Approx: Approx. 110-120 kg (dependent on options) Fuel Tank Capacity: Approx. 10-12 Liters 🛡️ Safety Features Ratings Safety Ratings: N/A (Motorcycles typically do not have standardized crash test ratings like cars) Active Features Braking System: Disc brakes front and rear for effective stopping power. Suspension Stability: Modern suspension design for ride stability and control. Passive Features Lighting: Headlight, taillight, and turn signals for visibility. 💡 Technology Features Infotainment Infotainment System: N/A (Analog instrumentation: speedometer, tachometer, basic indicator lights). Driver Assistance ABS: N/A Connectivity Connectivity Features: N/A 🔧 Maintenance Service Intervals Oil Change Engine: Recommended every 1,000-2,000 km or annually, refer to manual for precise interval. Spark Plug Check: Recommended every 2,000-3,000 km. Air Filter Cleaning: Recommended every 1,000-2,000 km, or more frequently in dusty conditions. Chain Lubrication Adjustment: Every 500 km or as needed. Fluid Specifications Engine Oil Type: Specific 2-stroke oil...