🏷️ Basic Information Identification Make: Aprilia Model: SR50 Year: 2009 Product Type: Service Repair Workshop Manual Codes Engine Code: M373M (Minarelli 50cc 2-stroke) 👋 Introduction Market Position Segment: Sporty 50cc scooter segment. Target Audience: Young riders, urban commuters seeking performance and style. Competitive Analysis Key Competitors: Yamaha Aerox, Piaggio Zip SP, Gilera Runner, Peugeot Speedfight. Key Features Vehicle Appeal: Aggressive styling, agile handling, potent 50cc engine for its class, liquid cooling, robust chassis. Manual Value Proposition Purpose: Empowers owners and technicians to perform accurate diagnostics, maintenance, and repairs, ensuring the longevity and optimal performance of the Aprilia SR50. 📋 Manual Details Coverage Areas General Coverage: Comprehensive service and repair instructions for the Aprilia SR50 (2009). Specific Systems: Engine, Transmission, Chassis, Electrical System, Bodywork, Suspension, Brakes, Fuel System, Cooling System, Exhaust System, Steering. Page Count Estimated Pages: Over 300 pages (typical for a comprehensive workshop manual of this nature). Manual Type Type: Workshop Manual / Service Manual / Repair Manual Language Language: English Format Format: Digital (likely PDF, but format may vary by vendor) 📖 Manual Coverage Systems Covered Engine Mechanical: Engine disassembly, inspection, assembly, overhaul, cylinder, piston, crankshaft, connecting rod, valve timing (if applicable), lubrication system. Fuel System: Carburetor tuning and overhaul (e.g., Dell'Orto PHVA), fuel pump operation, fuel filter replacement, fuel lines. Ignition System: CDI unit, spark plug specification, ignition timing checks. Transmission Drivetrain: Automatic CVT (Continuously Variable Transmission) operation, variator servicing, clutch assembly, final drive maintenance. Cooling System: Liquid cooling system, radiator, water pump, thermostat, coolant specifications, bleeding procedures. Exhaust System: Exhaust pipe removal, muffler inspection, gasket replacement. Brakes: Hydraulic disc brakes (front and rear), brake fluid type and bleeding, pad replacement, caliper servicing, rotor inspection. Suspension: Front telescopic forks (servicing, oil change), rear shock absorber inspection and replacement, linkage lubrication. Steering: Handlebar assembly, steering head bearing inspection and adjustment, control cable routing. Electrical System: Wiring diagrams, battery maintenance, starter motor, lighting system (headlight, taillight, indicators), horn, fuses, relays, instrument panel. Bodywork Chassis: Body panel removal and installation, seat, fairings, under-seat storage, frame inspection. Procedures Included Routine Maintenance: Oil changes, spark plug replacement, air filter cleaning/replacement, transmission oil change, brake fluid flush, tire pressure checks, chain adjustment (if applicable - usually belt drive on SR50). Troubleshooting: Diagnostic procedures for common issues, fault finding guides, error code interpretation (if applicable). Major Repairs: Engine rebuilds, transmission overhauls, suspension component replacement, brake caliper overhauls. Component Installation: Step-by-step guides for replacing parts like mufflers, brake pads, levers, etc. Technical Depth Depth: Detailed technical specifications, torque values, clearance measurements, diagnostic procedures, and overhaul instructions suitable for professional mechanics and advanced DIY enthusiasts. 📊 Manual Specifications File Format Format Details: Typically delivered as a searchable PDF file, allowing for quick access to information via keywords. Print Quality Quality: High-resolution scans or digitally created documents, ensuring clear text and legible diagrams. Binding Type Binding: N/A (Digital Format) Paper Type Paper: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Type: 2-stroke, single-cylinder, liquid-cooled Manufacturer: Minarelli Displacement: 49.3 cc Bore X Stroke: 39.3 mm x 40.9 mm Compression Ratio: Approx. 7.1:1 Performance Horsepower Peak: Approx. 5.5 - 6.5 HP @ 7000-8000 RPM (varies by specific tuning and market). Torque Peak: Approx. 5.5 - 6.0 Nm @ 7000-7500 RPM (varies). Fuel System Carburetor Model: Dell'Orto PHVA 17.5 QD (or similar 17.5mm carb) Fuel Type: Unleaded gasoline (minimum 95 RON recommended) Fuel Mixture: Automatic oil injection for 2-stroke oil. Lubrication Engine Oil Type: API TC or JASO FD certified 2-stroke synthetic or semi-synthetic oil. Cooling System: Liquid-cooled, with radiator and fan. Coolant Type: Ethylene glycol based antifreeze coolant (50/50 mix with distilled water). 🔧 Transmission Standard Type: Automatic Continuously Variable Transmission (CVT) Features Variator: Automatic variator with drive belts and pulleys for variable gear ratios. Clutch: Centrifugal automatic clutch. Final Drive: Geared final drive (oil lubricated). Fluid Type Final Drive Oil: SAE 80W-90 hypoid gear oil. 📐 Dimensions Exterior Length: Approx. 1870 mm Width: Approx. 705 mm Height: Approx. 1170 mm Wheelbase: Approx. 1330 mm Weights Dry Weight: Approx. 102 kg Gross Vehicle Weight Rating: Approx. 270 kg Tires Front Tire Size: 120/70-14 Rear Tire Size: 130/60-13 Wheels Bolt Pattern: N/A (typically single central nut for scooter wheels) 🛡️ Safety Features Ratings Safety Standards: Designed to meet European safety standards for mopeds/scooters. Active Features Braking System: Front and rear hydraulic disc brakes for effective stopping power. Lighting: Halogen headlight, taillight, and LED indicators for enhanced visibility. Passive Features Frame Construction: High-tensile steel frame providing a rigid and stable platform. Ergonomics: Designed for rider comfort and control, with intuitive handlebar controls. 💡 Technology Features Infotainment Instrument Cluster: Digital and analog combination instrument cluster displaying speed, RPM, fuel level, coolant temperature, odometer, trip meter, and indicator lights. Driver Assistance Stability Control: None (standard for this class of scooter). Connectivity Connectivity Features: None (standard for this class of scooter). 🔧 Maintenance Service...