🏷️ Basic Information Identification Make: Aprilia Model: SR 50 Year: 2008 Product Name: Aprilia SR 50 2008 Full Service Repair Manual 👋 Introduction Market Position Positioning: The Aprilia SR 50 (2008 model year) is a performance-oriented, sporty 50cc scooter known for its agile handling and distinctive styling, positioned as a premium option in the 50cc segment. Competitive Analysis Competitors: Competes with other 50cc performance scooters such as the Yamaha Aerox, Gilera Runner 50, and Peugeot Speedfight. Key Features Features: Liquid-cooled engine, powerful braking system, sport-tuned suspension, aggressive styling, and a reputation for reliable performance when properly maintained. 📋 Manual Details Coverage Areas Primary Coverage: Comprehensive service, repair, maintenance, troubleshooting, and rebuilding of the Aprilia SR 50 scooter. Page Count Estimated Page Count: 300+ Manual Type Type: Full Service Repair Manual Language Language: English Format Format: Digital (likely PDF, often provided as a downloadable file) 📖 Manual Coverage Systems Covered Engine: Complete engine disassembly, assembly, overhaul, tuning, and troubleshooting for the Piaggio LEADER engine variant. Fuel System: Carburetor (Dell'Orto PHBN 17.5 BS or similar) adjustment, cleaning, rebuilding, fuel tank, fuel lines, and fuel filter servicing. Ignition System: CDI unit, spark plug, ignition coil, wiring, and troubleshooting ignition faults. Cooling System: Liquid cooling system: radiator, coolant hoses, water pump, thermostat, coolant specifications, and bleeding procedures. Transmission: Automatic CVT (Continuously Variable Transmission): variator, clutch, belt, drive and driven pulleys, lubrication, and maintenance. Suspension: Front fork (telescopic hydraulic) disassembly, servicing, oil change, and rear shock absorber inspection and replacement. Brakes: Front and rear hydraulic disc brakes: brake calipers, master cylinders, brake lines, brake fluid type and bleeding procedures, pad replacement, and rotor inspection. Electrical System: Battery, starter motor, lighting system (headlight, taillight, indicators), horn, wiring diagrams, fuses, and troubleshooting electrical faults. Bodywork And Frame: Chassis inspection, body panel removal and installation, seat, fairings, handlebars, and general chassis maintenance. Wheels And Tires: Tire pressure, tire replacement, wheel bearing inspection and replacement, and wheel balancing (if applicable). Procedures Included Maintenance: Scheduled maintenance tasks, oil changes, filter replacements (air, oil, fuel), spark plug replacement, brake fluid flush, coolant replacement, and general inspections. Troubleshooting: Systematic diagnostic procedures for common and uncommon issues across all major vehicle systems, including starting problems, performance issues, and electrical faults. Repair: Step-by-step instructions for component repair and replacement, including engine rebuild, transmission overhaul, brake system repair, and electrical component replacement. Rebuilding: Detailed instructions for complete engine and transmission rebuilds, including torque specifications and clearances. Refurbishing Restoration: Guidance on restoring components, cosmetic improvements, and general refurbishment practices. Technical Depth Depth: Comprehensive, covering all aspects from basic owner maintenance to in-depth engine and electrical system diagnostics and repairs. Suitable for both DIY enthusiasts and professional mechanics. 📊 Manual Specifications File Format Format: PDF (typically) Print Quality Quality: High resolution for clear diagrams and text. Binding Type Type: N/A (Digital Format) Paper Type Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Two-stroke, liquid-cooled, single-cylinder (Piaggio LEADER 50cc engine variant typically) Displacement: 49.4 cc Bore X Stroke: Approx. 39mm x 41.4mm Cooling Method: Liquid-cooled Performance Horsepower: Approx. 5.0 - 5.4 HP (depending on specific market regulations and tuning) Torque: Approx. 4.5 - 5.0 Nm Fuel System Carburetor Model: Dell'Orto PHBN 17.5 BS (common fitment) Fuel Type: Unleaded Gasoline (minimum 95 RON recommended) Oil Type Injection: Two-stroke synthetic engine oil (specific Aprilia recommendations should be followed) Lubrication Engine Oil Type: SAE 10W-30 or 10W-40 (API SG or higher, for 4-stroke engines; not applicable for 2-stroke oil sump) Engine Specifications Compression Ratio: Approx. 10.0:1 🔧 Transmission Standard Transmission Type: Automatic CVT (Continuously Variable Transmission) with dry centrifugal clutch Optional Optional Transmissions: N/A (CVT is standard) Features Drive Type: Belt drive to rear wheel Transmission Oil Type: Refer to manual for specific gear oil (if applicable to final drive) or clutch lubrication requirements. 📐 Dimensions Exterior Length: Approx. 1850 mm Width: Approx. 720 mm Height: Approx. 1140 mm Wheelbase: Approx. 1330 mm Weights Dry Weight: Approx. 102 kg Gross Vehicle Weight Rating: Refer to vehicle placard or owner's manual for specific GVWR. Cargo Underseat Storage: Sufficient for one full-face helmet (typical for this model). 🛡️ Safety Features Ratings Crash Test Ratings: N/A (Motorcycles/scooters are not typically rated by agencies like NHTSA or Euro NCAP). Active Features Braking System: Hydraulic disc brakes front and rear for strong stopping power. Lighting: Integrated headlight, taillight, and turn signals for visibility. Passive Features Frame Construction: Steel frame providing rigidity and rider support. 💡 Technology Features Infotainment Features: Basic dashboard instrumentation (speedometer, odometer, fuel gauge, coolant temperature warning light, turn signal indicators). Driver Assistance Features: N/A (Focus on core mechanical and electrical systems). 🔧 Maintenance Service Intervals Engine Oil Change: Every 3,000 km or 1 year (for 4-stroke if applicable); for 2-stroke, check 2-stroke oil reservoir level regularly and refill as needed. Air Filter Cleaning Replacement: Every 4,000 km or as needed...