🏷️ Basic Information Identification Make: Aprilia Model: SR50 Factory Year: 2011 Generation Generation Designation: Second Generation (internal designation may vary) Codes Engine Code Primary: Minarelli 180cc 4-stroke Liquid-Cooled (Specific code may be chassis dependent, but commonly associated with Piaggio/Minarelli J300 or similar for this era/performance variant) 👋 Introduction Market Position Scooter Segment: High-performance sport scooter, premium urban mobility. Competitive Analysis Key Competitors: Yamaha TMAX series, Suzuki Burgman series, Kymco Downtown series, other premium 150cc+ scooters of the era. Key Features Performance Orientation: Designed for sporty handling, acceleration, and capable of highway cruising. Technological Advancement: Often features advanced engine technology and chassis design for its class. 📋 Manual Details Coverage Areas Manual Coverage Scope: Comprehensive repair and service for all mechanical and electrical systems. Page Count Estimated Pages: Hundreds (exact count varies by edition, typically 300+ pages for full factory manuals) Manual Type Type: Factory Service Repair Manual Language Language: English (Primary language for downloaded PDF, original may include others) Format Format: Downloadable PDF 📖 Manual Coverage Systems Covered Engine Service: Complete engine overhaul, disassembly, assembly, component testing, and tuning. Fuel System: Fuel injection system (EFI), fuel pump, injectors, pressure regulator, fuel tank, lines. Cooling System: Radiator, coolant pump, thermostat, hoses, fluid specifications and bleeding procedures. Transmission Clutch: Automatic transmission (CVT), variator, clutch assembly, drive belt inspection and replacement, gear oil specifications. Brakes: Front and rear brake systems (likely disc brakes), hydraulic lines, master cylinders, calipers, pad replacement, fluid specifications (DOT 4), bleeding procedures. Suspension: Front telescopic fork (likely inverted), rear monoshock absorber, spring preload adjustment, fork oil type and level, seal replacement. Electrical System: Battery, starter motor, charging system (stator, regulator/rectifier), ignition system, lighting (headlight, taillight, indicators), fuses, wiring diagrams. Chassis Bodywork: Frame inspection, body panel removal and installation, seat, handlebars, footpegs, fairings. Diagnostics Troubleshooting: Fault codes, diagnostic procedures for common issues, troubleshooting charts. Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug service, brake fluid checks, tire pressure, coolant level checks. Component Overhaul: Engine rebuilds, transmission overhauls, suspension component rebuilding. Electrical Diagnostics: Wiring harness tracing, component testing, sensor troubleshooting. Special Tools: Listing and usage of required specialized tools for specific repair procedures. Torque Specifications: Detailed torque values for all critical fasteners and components. Technical Depth Depth Level: Comprehensive factory-level detail, suitable for professional technicians and advanced DIY mechanics. 📊 Manual Specifications File Format File Type: PDF (Portable Document Format) Print Quality Print Readability: High-resolution scans optimized for clear printing and digital viewing. Binding Type Digital Binding: N/A (Digital download, no physical binding) Paper Type Digital Paper Simulation: N/A (Digital document, page simulation not applicable) ⚙️ Engine Specifications Primary Engine Engine Type: Four-stroke, liquid-cooled, DOHC (Double Overhead Camshaft) Displacement: Approximately 180cc (Specific variant designation may apply, check VIN for exact configuration. Often a development of the Piaggio LEADER engine architecture.) Bore X Stroke: Specifics vary by exact Minarelli/Piaggio configuration for the SR50 Factory 180cc. (Example: 63mm x 58mm for a similar Piaggio unit, but needs confirmation for this specific model). Compression Ratio: Typically around 11.0:1 to 12.5:1 for modern 4-stroke performance engines. Power Output: Likely in the range of 15-20 HP (approx. 11-15 kW) at peak RPM, depending on tuning and specific market regulations. Torque Output: Estimated 15-20 Nm, with peak delivery in the mid-range RPM for responsive acceleration. Performance Top Speed: Capable of exceeding 100 km/h (approx. 62 mph), suitable for moderate highway use. Fuel System Fuel Delivery: Electronic Fuel Injection (EFI) with throttle body and associated sensors. Fuel Type: Unleaded gasoline, minimum 91 RON (87 AKI). Fuel Tank Capacity: Typically around 7-9 liters, providing a cruising range of 150-200 km. 🔧 Transmission Standard Transmission Type: Automatic Continuously Variable Transmission (CVT) Drive Mechanism: Belt drive to rear wheel via centrifugal clutch and reduction gear. Optional Optional Transmission Types: N/A (CVT is standard for this model) Features Gear Reduction Ratio: Specific reduction gear ratios are detailed in the manual. Transmission Fluid: Specific gear oil type and capacity is critical and detailed in the manual. (e.g., SAE 75W/90 or similar for scooter reduction gears). 📐 Dimensions Exterior Length: Approx. 1860 mm Width: Approx. 720 mm (at handlebars) Height: Approx. 1200 mm (at seat) Wheelbase: Approx. 1330 mm Weights Dry Weight: Approx. 130-140 kg (Varies slightly based on specific equipment) Gross Vehicle Weight Rating: Approx. 280-300 kg (Includes rider and cargo) Cargo Underseat Storage: Sufficient for a full-face helmet, with potential for additional small items. 🛡️ Safety Features Ratings Crash Test Information: N/A (Motorcycles and scooters are not typically rated by NHTSA or Euro NCAP in the same manner as cars). Active Features Braking System: Dual disc brakes (front and rear) with hydraulic actuation, providing strong stopping power. Lighting: Halogen or LED headlights, taillights, and brake lights for enhanced visibility. Tires: Sport-oriented tubeless tires providing good grip and stability. Passive Features Chassis Design: Rigid frame structure for stable handling characteristics. Handlebar...