🏷️ Basic Information Identification Make: Aprilia Model: SR 50 Year: 2007 Product Name: Aprilia SR 50 2007 Full Service Repair Manual 👋 Introduction Market Position Segment: High-performance 50cc scooter segment, often targeting younger riders or urban commuters seeking sporty styling and agility. Competitive Analysis Competitors: Competes with other premium 50cc scooters from brands like Yamaha (Aerox 50), Piaggio (Zip 50), Kymco, and Malaguti, known for their sporty handling and engine performance. Key Features Sporty Design: The SR 50 is characterized by its aggressive, sporty styling, inspired by larger sport motorcycles. Performance Orientation: Tuned for sporty acceleration and agile handling, often featuring upgraded suspension and braking components compared to basic commuter scooters. Engine Technology: Typically features liquid-cooled, two-stroke engines, known for their power output in the 50cc class, though specific engine variants may exist. 📋 Manual Details Coverage Areas Primary Coverage: Full Service Repair Page Count Estimated Page Count: High (Detailed, likely 300-600+ pages based on 'Full Service Repair' description) Manual Type Type: Service Manual / Repair Manual Language Language: English (Assumed based on product description phrasing) Format Format: Digital (Likely PDF, common for online sales) 📖 Manual Coverage Systems Covered Engine: Comprehensive coverage of the SR 50's engine, including disassembly, assembly, tuning, and troubleshooting. Fuel System: Detailed information on carburetor/fuel injection systems, fuel pump, fuel lines, and filters. Cooling System: Radiator, water pump, thermostat, coolant fluid specifications, and leak detection procedures. Ignition System: Spark plug, ignition coil, CDI unit, stator, and troubleshooting ignition faults. Exhaust System: Muffler, exhaust pipe, catalytic converter (if applicable), and gasket replacement. Transmission: Automatic CVT (Continuously Variable Transmission) operation, belt replacement, clutch assembly, and variator maintenance. Chassis: Frame integrity, fork removal and service, shock absorber adjustment and replacement. Brakes: Front and rear brake systems (disc/drum), hydraulic lines, brake fluid specifications, caliper service, and bleeding procedures. Electrical System: Wiring diagrams, battery maintenance, lighting system, starting system, charging system, and component testing. Bodywork And Trim: Fairing removal and installation, seat, storage compartments, and cosmetic component repair. Wheels And Tires: Wheel bearing replacement, tire pressure specifications, and mounting/dismounting procedures. Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug checks, brake adjustments, chain/belt lubrication, and general inspection. Troubleshooting: Diagnostic flowcharts and common problem identification for various systems (e.g., starting issues, poor performance, electrical faults). Rebuild Procedures: Detailed step-by-step instructions for engine, transmission, and major component rebuilds. Component Replacement: Instructions for replacing wear items such as brake pads, drive belts, bulbs, and fluids. Suspension Service: Front fork overhaul, rear shock absorber service, and bearing maintenance. Electrical Diagnostics: Testing of electrical components, wiring harness repair, and troubleshooting charging/starting systems. Torque Specifications: Precise torque values for critical fasteners across all major components. Technical Depth Depth: Comprehensive, covering everything from basic maintenance to complete engine rebuilds and advanced diagnostics. 📊 Manual Specifications File Format Format: PDF (Probable, offering searchability and easy access) Print Quality Quality: High-resolution digital images and diagrams suitable for printing. Binding Type Binding: N/A (Digital format) Paper Type Paper: N/A (Digital format) ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, two-stroke, single-cylinder (Common for SR 50 performance models) Displacement: Approximately 49cc Bore X Stroke: Typically around 39mm x 41.4mm (specifics may vary slightly) Cooling Method: Liquid-cooled Performance Horsepower: Estimated 5-7 HP at around 7000-8000 RPM (depending on specific tuning and emission regulations). Torque: Estimated 4-5 Nm at around 6000-7000 RPM. Fuel System Induction: Carburetor (e.g., Dell'Orto PHVA 17.5 or similar) or electronic fuel injection (EFI) on later/specific models. Fuel Type: Unleaded gasoline (95 RON recommended) Oil Mixture: Automatic oil injection system for pre-mixing two-stroke oil with fuel. 🔧 Transmission Standard Type: Automatic, Continuously Variable Transmission (CVT) Optional Options: N/A (CVT is standard for this model) Features Clutch: Centrifugal clutch Drive Belt: V-belt drive Gear Ratios: Continuously variable via variator and clutch mechanism, providing optimal gearing for acceleration and top speed. 📐 Dimensions Exterior Length: Approx. 1730 mm (70.1 in) Width: Approx. 720 mm (28.3 in) Height: Approx. 1120 mm (44.1 in) Wheelbase: Approx. 1210 mm (47.6 in) Weights Dry Weight: Approx. 95 kg (209 lbs) Gross Weight Capacity: Typically around 250-280 kg (550-617 lbs) for rider and passenger. Cargo Storage: Under-seat storage compartment, often capable of holding a full-face helmet. 🛡️ Safety Features Ratings Crash Test Results: Scooter safety is typically assessed based on component reliability and rider protection; specific crash test ratings are uncommon for this vehicle class. Active Features Brakes: Hydraulic front disc brake, rear disc or drum brake (depending on specific variant). Anti-lock Braking System (ABS) was an option on some higher-end SR 50 models in later years, but less common for 2007. Lighting: Halogen headlights, taillights, and turn signals for visibility. Passive Features Frame Construction: Steel tube frame providing structural rigidity. Tires: Tubeless tires for reduced risk of sudden deflation. 💡 Technology Features Infotainment Display: Digital instrument cluster displaying speedometer, odometer, fuel level, coolant temperature, and...