🏷️ Basic Information Identification Make: Aprilia Model: MX 125 Year: 2003, 2004 Codes Product Name: Aprilia MX 125 Motorcycle Complete Workshop Service Repair Manual 2003 2004 👋 Introduction Market Position Market Segment: High-performance off-road (motocross) motorcycle for young riders or entry-level enthusiasts. Competitive Analysis Competitors 2003 2004: KTM SX 125, Yamaha YZ125, Honda CR125R, Suzuki RM125, Kawasaki KX125 Key Features Target User: DIY mechanics, motorcycle owners seeking to perform their own maintenance and repairs, enhancing cost savings. Manual Benefit: Enables owners to save significant money on dealership service costs by providing comprehensive, easy-to-follow repair instructions. Accessibility: Downloadable for instant access on various devices (PC, Mac, tablet, smartphone). 📋 Manual Details Coverage Areas General Coverage: All service and repair procedures A-Z Models Covered: All Aprilia MX 125 models/engines/trim/transmission types for the specified years Page Count Estimated Page Count: Extensive, likely 300+ pages (typical for comprehensive workshop manuals) Manual Type Type: Workshop Service Repair Manual Language Language: English Format Format: Digital Download (PDF) 📖 Manual Coverage Systems Covered Engine: Engine assembly, disassembly, tuning, cooling system, lubrication system, ignition system, fuel system, exhaust system Transmission: Gearbox, clutch, shifting mechanism, lubrication Chassis: Frame, suspension (front and rear forks, shock absorber), steering system, wheels, tires Brakes: Hydraulic brake systems (front and rear calipers, master cylinders, brake lines, pads, rotors) Electrical: Wiring diagrams, lighting, battery, charging system, ignition system, starter, instrumentation, fuses Fuel System: Carburetor (e.g., Dell'Orto PHBH 28 AS), fuel tank, fuel lines, fuel pump (if applicable) Cooling System: Liquid cooling system, radiator, hoses, thermostat, coolant specifications Bodywork And Trim: Fairings, seat, fuel tank cover, fenders, handlebars, controls Procedures Included Routine Maintenance: Oil changes, filter replacements, chain lubrication and adjustment, tire pressure checks, brake inspections, spark plug servicing Troubleshooting: Diagnostic procedures for common problems, fault finding charts Engine Overhaul: Piston, cylinder, crankshaft, valve timing (if applicable), seals, gaskets Transmission Repair: Gearbox disassembly and reassembly, clutch replacement, bearing servicing Suspension Service: Fork oil change, seal replacement, shock absorber servicing Electrical Diagnostics: Component testing, wiring harness repair, troubleshooting electrical faults Brake System Repair: Bleeding procedures, caliper overhaul, master cylinder replacement, pad/rotor replacement Technical Depth Depth: Comprehensive: Covers basic maintenance to complete engine and chassis rebuilds, including detailed specifications and diagrams. 📊 Manual Specifications File Format File Type: PDF (Portable Document Format) Software Requirement: Adobe Reader (free download) Print Quality Printability: Printable (individual pages, chapters, or entire manual) Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, 2-stroke, single-cylinder Displacement: 124.8 cc (7.6 cubic inches) Bore X Stroke: 54 mm x 54.5 mm (typical for this era's 125cc 2-strokes) Compression Ratio: Approximately 8.5:1 (typical for a 125cc 2-stroke) Performance Horsepower Peak: Estimated 30-35 HP (at crankshaft, specific figures vary) Torque Peak: Estimated 20-23 Nm (at crankshaft, specific figures vary) Fuel System Carburetor Model: Dell'Orto PHBH 28 AS (common specification) Fuel Type: Unleaded gasoline, requires 2-stroke oil pre-mix (typically 1:30 or 1:40 ratio depending on oil) Ignition System Ignition Type: Electronic ignition (CDI) Lubrication System Lubrication Method: Premix or Automatic Oil Injection (if equipped with oil pump) 🔧 Transmission Standard Gearbox Type: 6-speed constant mesh Clutch Type: Wet multi-plate Features Final Drive: Chain drive 📐 Dimensions Exterior Length: Approx. 2100 mm (variable based on model specifics) Width: Approx. 800 mm (variable based on model specifics) Height: Approx. 1200 mm (variable based on model specifics) Weights Dry Weight: Approx. 95-100 kg (typical for this class) Fuel Capacity: Approx. 7-9 Liters Wheelbase: Approx. 1450 mm 🛡️ Safety Features Ratings Safety Focus: Designed for off-road use, emphasis on rider control and stability. No official road safety ratings apply. Active Features Braking System: Hydraulic disc brakes front and rear for effective stopping power. Suspension System: Long-travel suspension (e.g., Marzocchi or Paioli USD forks, single rear shock) for absorbing impacts. Passive Features Frame Construction: Robust perimeter frame designed for torsional rigidity and strength. 💡 Technology Features Infotainment Infotainment System: Basic instrumentation: Speedometer, odometer, neutral indicator, high-beam indicator. No advanced infotainment features. Driver Assistance Driver Assistance Features: None. Focus is on mechanical and rider control. Connectivity Connectivity Features: None. Not designed for external device connectivity. 🔧 Maintenance Service Intervals Engine Oil Change: Typically every 10-15 hours of riding, or as per manual recommendation (e.g., monthly for light use). Air Filter Cleaning: After every few rides, especially in dusty conditions. Spark Plug Replacement: Every 20-30 hours of riding, or as needed based on performance. Chain Lubrication Adjustment: Every 200-300 km, or as needed, checking for proper tension. Fluid Specifications Engine Oil: Specific 2-stroke engine oil meeting API TC or JASO FD standards (refer to manual for exact grade and brand recommendations). Gearbox Oil: SAE 75W/90 or SAE 10W/40 API GL-4 transmission oil (refer to manual for exact specification). Coolant: Ethylene glycol-based antifreeze mixed with distilled water in a 50:50 ratio (refer to manual...