🏷️ Basic Information Identification Make: Aprilia Model: SR 50 Factory Product Type: Service Repair Manual 👋 Introduction Market Position Vehicle Segment: High-Performance 50cc Scooter Competitive Analysis Competitors: Yamaha Aerox 50, Gilera Runner 50, Piaggio Zip SP Key Features Manual Value: Enables DIY repairs, reduces repair costs, provides expert-level guidance Vehicle Appeal: Sporty design, agile handling, spirited performance for its class 📋 Manual Details Coverage Areas Primary Coverage: Mechanical and Electrical Systems Secondary Coverage: Maintenance, Troubleshooting, Repair, Diagnostics Page Count Estimated Page Count: 200-300 (Estimated, based on typical service manual depth for this model) Manual Type Type: Factory Service Manual Language Language: English Format Format: PDF (Downloadable) 📖 Manual Coverage Systems Covered Engine Mechanical: Engine Removal, Disassembly, Cylinder Head, Cylinder, Piston, Crankshaft, Oil Pump, Water Pump, Clutch Engine Electrical: Ignition Unit, Electric Starter Procedures Included Maintenance: Maintenance Schedule, Routine Checks, Fluid Changes Repair: Component Repair, Reassembly, Installation Technical Depth Depth: Comprehensive Rebuild and Repair Procedures 📊 Manual Specifications File Format Quality: High-Resolution, Searchable PDF Print Quality Printability: Yes (Printable) Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) Compatibility Operating Systems: WINDOWS and MAC Requirements Software: Adobe PDF Reader ⚙️ Engine Specifications Primary Engine Type: Liquid-cooled, 2-stroke Displacement: 49.3 cc (Specific to model variants) Bore X Stroke: 39.0 mm x 41.4 mm (Typical for Morini engine) Compression Ratio: Approx. 12.5:1 (Typical) Power Output: Approx. 5-7 HP (Varies by year and specific engine tune) Torque: Not widely published, but optimized for low-to-mid range acceleration Performance Top Speed: Governed by legislation, typically around 45 mph for 50cc class Fuel System Carburetor: Dell'Orto PHBN 17.5 (Commonly used, specific model may vary) Fuel Type: Unleaded Gasoline (95 RON recommended) Oil Mixing: Automatic oil injection system Engine Components Crankshaft Type: One-piece, forged Piston Type: Single-ring, aluminum alloy 🔧 Transmission Standard Type: Automatic CVT (Continuously Variable Transmission) Drive: Belt drive Features Clutch: Centrifugal automatic clutch 📐 Dimensions Exterior Length: Approx. 1800-1850 mm (Varies slightly by year) Width: Approx. 740-760 mm Height: Approx. 1150-1170 mm Weights Dry Weight: Approx. 100-105 kg Max Load: Typically 150 kg (Rider + Passenger + Luggage) Cargo Storage: Under-seat storage compartment 🛡️ Safety Features Ratings Crash Test Data: N/A (Scooters typically not subjected to standardized car crash tests) Active Features Brakes Front: Disc brake (Hydraulic, typically 220mm diameter) Brakes Rear: Disc brake (Hydraulic, typically 190mm diameter) Suspension Front: Telescopic hydraulic fork (Typical 30-32mm stanchion diameter) Suspension Rear: Unit swingarm with adjustable shock absorber Passive Features Lighting: Halogen headlight, LED taillight/brake light (Factory model specific) Tires Front: 120/70-13 (Common size for Factory models) Tires Rear: 130/60-13 (Common size for Factory models) 💡 Technology Features Infotainment Instrument Cluster: Digital and analog display, speedometer, tachometer, fuel gauge, coolant temperature, clock. Lighting Technology: Integrated LED lighting for taillights and brake lights on Factory models. Driver Assistance ABS: Some later 'Factory' models may have been equipped with ABS as an option or standard feature, consult specific model year. Connectivity Diagnostic Ports: On-board diagnostics (OBD) port for electronic troubleshooting, if equipped. 🔧 Maintenance Service Intervals Oil Change: Every 3,000-5,000 km or annually, check manual for specifics. Spark Plug: Inspect every 3,000 km, replace as needed or every 6,000-10,000 km. Air Filter: Clean every 3,000 km, replace as needed (typically every 6,000-12,000 km). Gearbox Oil: Check level periodically, change every 6,000-10,000 km. Fluid Specifications Engine Oil: 2-stroke synthetic oil, specific grade as per Aprilia recommendation (e.g., API TC, JASO FD). Coolant: Ethylene glycol-based coolant, typically a 50/50 mix with distilled water. Brake Fluid: DOT 4 synthetic brake fluid. Gearbox Oil Type: SAE 80W-90 API GL-3 or GL-4 gear oil. Known Issues Common Problems: Carburetor jetting sensitivity, variator/clutch wear, occasional electrical connector issues, water pump seal leaks. Preventative Maintenance: Regular cleaning of the air filter and carburetor, checking for coolant leaks, ensuring proper 2-stroke oil mixture. 📚 Vehicle History Brand Heritage Marque Origin: Italian motorcycle manufacturer founded in 1945 Model Evolution Sr50 Development: The SR 50 line has been a staple for Aprilia, evolving with performance enhancements and modern features, with the 'Factory' designation indicating a higher-spec, performance-oriented version often featuring upgraded components. Production Manufacturing Location: Italy (Primary) Production Years: The SR 50 Factory model was produced from approximately 2004 onwards, with continuous updates. 🏆 Awards & Recognition Recognitions Awards: While specific awards for the SR 50 Factory are not widely publicized as separate entities, Aprilia models are consistently recognized for their sporty performance and Italian design in the scooter market.