🏷️ Basic Information Identification Make: Aprilia Model: SR50 Year: 1992 Vehicle Type: Scooter 👋 Introduction Market Position Market Segment: Performance-oriented sport scooter targeting the enthusiast rider market. Competitive Analysis Competitors: Competed with other 50cc performance scooters of its era, emphasizing Italian design and sporty handling. Key Features Design Philosophy: Aggressive styling, agile chassis, and a focus on performance and rider engagement. 📋 Manual Details Coverage Areas Manual Type: Factory Service Repair Manual Language: English Format: Downloadable PDF Page Count Page Count: Hundreds of pages 📖 Manual Coverage Systems Covered Engine Overhaul: Complete engine disassembly, inspection, repair, and reassembly procedures for all components. Fuel System: Carburetor tuning, cleaning, and rebuilding; fuel tank, fuel pump, and fuel line maintenance. Ignition System: Spark plug specifications, ignition timing, CDI unit testing, and stator coil inspection. Cooling System: Radiator service, coolant specifications, water pump inspection, and thermostat operation. Transmission And Drivetrain: Automatic transmission (CVT) operation, belt inspection and replacement, clutch assembly service, and gear reduction maintenance. Brakes: Front and rear brake caliper overhaul, brake pad replacement, brake fluid specifications and bleeding procedures, brake line inspection. Suspension: Front fork overhaul, rear shock absorber service, linkage inspection, and suspension geometry adjustments. Electrical System: Wiring diagrams, lighting system troubleshooting, battery maintenance, starter motor operation, and charging system testing. Bodywork And Chassis: Fairing removal and installation, seat repair, frame inspection, and body panel alignment. Procedures Included Scheduled Maintenance: Detailed steps for routine checks, lubrication, filter replacements, and fluid changes at specified intervals. Troubleshooting Guides: Systematic diagnostic procedures for common and uncommon issues, including symptom analysis and repair solutions. Repair Procedures: Step-by-step instructions for component removal, installation, and repair for all major vehicle systems. Specifications And Torques: Precise torque values for all fasteners, component clearances, and critical assembly measurements. Technical Depth Depth Of Coverage: Comprehensive from basic rider maintenance to full engine rebuilds and electrical diagnostics. 📊 Manual Specifications File Format File Format: PDF Print Quality Print Quality: High-resolution, suitable for professional printing. Binding Type Binding Type: N/A (Digital PDF) Paper Type Paper Type: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Type: Two-stroke, single-cylinder, liquid-cooled Displacement: 49.3 cc Bore X Stroke: 39.0 mm x 41.4 mm Compression Ratio: Approx. 7.4:1 Performance Horsepower Output: Approx. 6.5 - 7.0 HP (Varies by specific tuning and market) Torque Output: Approx. 6.0 - 6.5 Nm (Varies by specific tuning and market) Fuel System Carburetor Model: Dell'Orto PHBN 12 (or similar) Fuel Type: Unleaded gasoline (minimum 95 RON) Fuel Mixture: Pre-mix (2% synthetic 2-stroke oil in fuel) or automatic oil injection system 🔧 Transmission Standard Transmission Type: Automatic (CVT - Continuously Variable Transmission) Features Clutch Type: Centrifugal automatic clutch Final Drive: Gear reduction 📐 Dimensions Exterior Length: Approx. 1700 mm Width: Approx. 700 mm Height: Approx. 1100 mm Weights Dry Weight: Approx. 90 kg Fuel Tank Capacity: Approx. 7.0 Liters 🛡️ Safety Features Ratings Safety Certification: CE compliant (European standards) Active Features Braking System: Front disc brake, rear drum brake (some markets may have rear disc) Lighting: Halogen headlight, taillight, turn signals Passive Features Frame Construction: Steel tubing frame 💡 Technology Features Infotainment Instrument Cluster: Analog speedometer, tachometer (RPM gauge), fuel level indicator, engine temperature gauge, indicator lights. Driver Assistance ABS: N/A (Anti-lock Braking System was not standard or common on this model) Connectivity Connectivity Features: N/A (No digital connectivity features) 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000 km or annually (gearbox oil) Spark Plug Replacement: Every 6,000 km (or as per manual recommendation) Air Filter Cleaning: Every 2,000 km or annually Fluid Specifications Engine Oil Type: High-quality 2-stroke synthetic oil (e.g., Motul 7100 2T, Castrol Power 1 Racing 2T) Gearbox Oil Type: SAE 80W/90 API GL-3 or GL-4 transmission oil Coolant Type: Ethylene glycol-based antifreeze mixture (50% coolant, 50% distilled water) Brake Fluid Type: DOT 4 brake fluid Known Issues Carburetor Fouling: Common with older two-strokes, requiring regular cleaning and adjustment. Cvt Belt Wear: The drive belt can wear over time and requires periodic inspection and replacement. Electrical Connector Corrosion: Can occur in humid or coastal environments, affecting lighting and ignition. 📚 Vehicle History Brand Heritage Manufacturer Origin: Italy Model Evolution Model Introduction Year: The SR50 line was introduced in the late 1980s, with the 1992 model representing an evolution of the original design. Production Manufacturing Location: Primarily Italy