🏷️ Basic Information Identification Make: Aprilia Model: SR 50 Year: 2005 Generation Generation Code: Piaggio C36/C37 (Di-Tech/Purejet) 👋 Introduction Market Position Market Position: The Aprilia SR 50 (2005) was a highly popular performance-oriented 50cc scooter, particularly in European markets, known for its sporty styling and agile handling, often competing with models like the Yamaha Aerox and Gilera Runner. Competitive Analysis Competitive Analysis: The 2005 model year encompassed significant technological advancements, particularly with the introduction of the Purejet direct-injection 2-stroke engine, which offered improved fuel efficiency and performance over its carbureted predecessors. This manual covers both engine variants, providing comprehensive support for owners of either type. Key Features Key Features: This manual's key feature is its 'new & updated' status for the 2005 model year, ensuring accuracy for this specific generation. Its cross-platform compatibility (PC, MAC, Tablets, Smartphones) makes it highly accessible. The emphasis on 'easy to do' repairs and significant cost savings highlights its practical value for owners. 📋 Manual Details Coverage Areas Coverage Areas: All SR 50 models (Di-Tech and Purejet variants for 2005) Page Count Page Count: Estimated 300-450 pages (typical for a comprehensive workshop manual) Manual Type Manual Type: Complete Workshop Repair Manual Language Language: English Format Format: Digital Download (PDF) 📖 Manual Coverage Systems Covered Engine: Detailed diagnostics, repair, and overhaul of Piaggio Hi-Per 50cc 2-stroke engines (Liquid-Cooled Di-Tech and Purejet). Fuel System: Fuel injection (Purejet), Carburetor systems (Di-Tech), fuel pump, filters, lines, and troubleshooting. Ignition System: CDI ignition, spark plugs, coils, wiring diagrams, and fault diagnosis. Cooling System: Liquid cooling system, radiator, water pump, coolant hoses, thermostat, and bleeding procedures. Transmission: Automatic CVT (Continuously Variable Transmission) system, clutch, variator, torque driver, drive belt, and reduction gear maintenance. Brakes: Hydraulic disc brakes (front and rear), brake fluid specifications, bleeding, caliper overhaul, pad replacement, and master cylinder service. Suspension: Front telescopic fork and rear shock absorber service, seals, oil levels, and adjustments. Electrical System: Complete electrical system, battery, starter, lighting, indicators, horn, wiring diagrams, component testing, and troubleshooting. Chassis And Bodywork: Frame inspection, fairing removal/installation, seat, handlebars, and other body components. Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, spark plug service, drive belt inspection, tire pressure, brake checks, and general upkeep. Troubleshooting: Diagnostic procedures for common issues, fault codes (if applicable to Di-Tech), starting problems, performance issues, and electrical faults. Repair: Step-by-step instructions for component disassembly, repair, reassembly, and adjustments for all major systems. Engine Overhaul: Full engine teardown, piston replacement, cylinder inspection, crankshaft and connecting rod checks, and rebuild procedures. Transmission Service: Variator roller replacement, clutch shoe inspection, torque driver adjustment, and drive belt replacement. Electrical Diagnostics: Use of multimeters, testing specific circuits, component replacement, and understanding wiring diagrams. Technical Depth Technical Depth: Professional-level detail, covering everything from routine maintenance to complete engine rebuilds and complex electrical diagnostics. Suitable for both experienced mechanics and DIY enthusiasts. 📊 Manual Specifications File Format File Format: PDF Print Quality Print Quality: High-resolution, printable pages with clear diagrams and text. Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: 2-stroke, 2-valve, Piaggio Hi-Per Engine (Liquid-Cooled) Displacement: 49.4 cc (for both Di-Tech and Purejet variants) Bore X Stroke: 39.0 mm x 41.4 mm Compression Ratio: Di-Tech: ~12.4:1, Purejet: ~14.5:1 (approximate, specific values may vary) Performance Horsepower: Approximately 5.0 - 6.0 HP at 7000 RPM (depending on variant and market restrictions) Torque: Approximately 5.5 - 6.5 Nm at 6500 RPM (depending on variant) Fuel System Fuel Induction Di Tech: Carburetor (e.g., Dell'Orto PHVA 17.5) Fuel Induction Purejet: Electronic Direct Injection (EDI) with throttle body Fuel Type: Unleaded gasoline (min. 95 RON) Oil Type: 2-stroke synthetic oil (for separate oil tank injection system) Cooling System Cooling Method: Liquid-cooled 🔧 Transmission Standard Transmission Type: Automatic CVT (Continuously Variable Transmission) Clutch Type: Centrifugal clutch Drive Belt: Reinforced V-belt Features Gear Reduction: Integrated reduction gears Fluid Requirements: Specific gear oil for reduction gears (e.g., SAE 80W/90). 📐 Dimensions Exterior Length: Approx. 1840 mm Width: Approx. 740 mm Height: Approx. 1135 mm (seat height may vary) Wheelbase: Approx. 1325 mm Weights Dry Weight: Approx. 104 kg Fuel Tank Capacity: 7.0 Liters (including 1.0 Liter reserve) 🛡️ Safety Features Ratings Safety Ratings: N/A (Scooters of this class typically do not undergo formal NCAP crash testing, but adherence to European safety standards is expected). Active Features Braking System: Hydraulic disc brakes front and rear for superior stopping power. Tires: Tubeless sport-oriented tires for improved grip and safety. Passive Features Lighting: Halogen headlight, taillight, and bright indicator lights for visibility. Frame Construction: Steel frame providing a rigid and stable platform. 💡 Technology Features Infotainment Infotainment Features: Basic dashboard instrumentation with speedometer, odometer, fuel gauge (on some versions), turn signal indicators, and warning lights. Driver Assistance Driver Assistance Features: No advanced driver-assistance systems (ADAS) typical of modern...