🏷️ Basic Information Identification Make: Aprilia Model: SR50 Year: 2005 Product Name: Aprilia SR50 2005 Factory Service Repair Manual Sku: APR-SR50-2005-FSM Codes Chassis Code: Piaggio Z D4SB0000 👋 Introduction Market Position Segment: Performance-oriented 50cc scooter Target Audience: Enthusiasts, mechanics, owners seeking in-depth technical knowledge Competitive Analysis Competitors: Aprilia SR50 Sport, Gilera Runner 50, Yamaha Aerox 50, Piaggio Zip 50 Key Features Features: Sporty design, liquid-cooled engine, advanced suspension, high-performance capabilities for its class Manual Value Value Proposition: Enables DIY maintenance and repairs, reducing reliance on professional services and maximizing vehicle longevity. 📋 Manual Details Coverage Areas Engine Overhaul: True Transmission Service: True Electrical System Diagnostics: True Suspension And Steering: True Brake System Maintenance: True Cooling System: True Fuel System And Carburetor: True Body And Frame: True Troubleshooting Guide: True Wiring Diagrams: True Scheduled Maintenance: True Page Count Estimated Pages: Hundreds (Printable) Manual Type Type: Factory Service Repair Manual Scope: Complete Official Full Factory Documentation Language Language: English Format Format: Downloadable PDF 📖 Manual Coverage Systems Covered Powertrain: Engine, Transmission (CVT), Final Drive Chassis: Suspension (Front Fork, Rear Shock), Steering, Brakes (Front Disc, Rear Disc), Wheels, Tires Electrical: Ignition System, Lighting System, Starting System, Charging System, Instrumentation, ECU Diagnostics Fuel And Exhaust: Fuel Delivery, Carburetor (Dell'Orto PHBG 19 DD), Exhaust System Cooling: Liquid Cooling System Procedures Included Engine Disassembly And Assembly: True Carburetor Tuning And Rebuild: True Transmission Belt And Roller Replacement: True Brake Pad And Caliper Service: True Suspension Fork Seal Replacement: True Electrical Component Testing: True Diagnostic Trouble Code Retrieval: True Bodywork Panel Removal And Installation: True Fluid Level Checks And Changes: True Tire And Wheel Mounting: True Technical Depth Depth: Comprehensive factory-level repair and maintenance Diagnostics: In-depth diagnostic procedures and troubleshooting charts Rebuilds: Complete engine and component rebuild instructions 📊 Manual Specifications File Format Format: PDF Searchability: Searchable text content Print Quality Quality: High-resolution, clear and crisp images and text Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: 2-stroke, single-cylinder, liquid-cooled Displacement: 49.4 cc Bore X Stroke: 39.3 mm x 40 mm Compression Ratio: 8.7 : 1 (nominal) Lubrication: Forced lubrication with automatic oil mixing Performance Horsepower Hp: ~5.4 HP @ 7500 RPM (approximate, may vary) Torque Nm: ~6.0 Nm @ 7000 RPM (approximate, may vary) Fuel System Carburetor Model: Dell'Orto PHBG 19 DD Fuel Type: Unleaded gasoline (95 RON recommended) Fuel Tank Capacity: 7.0 Liters 🔧 Transmission Standard Type: Automatic Continuously Variable Transmission (CVT) - "Di-Tech" variant may differ Clutch: Automatic centrifugal clutch Features Gear Ratios: Variable (CVT) Final Drive: Geared final drive 📐 Dimensions Exterior Length: Approx. 1870 mm Width: Approx. 720 mm Height: Approx. 1200 mm (seat height) Weights Dry Weight: Approx. 106 kg Gross Vehicle Weight Rating: Not specified, typical ~250-300 kg Cargo Underseat Storage: Sufficient for a full-face helmet 🛡️ Safety Features Ratings Crash Test Ratings: N/A for scooters of this era Active Features Brakes: Front: Hydraulic Disc, Rear: Hydraulic Disc Tires: Tubeless tires Passive Features Lighting: Halogen headlight, LED tail light Frame Construction: High-strength steel frame 💡 Technology Features Infotainment Instrument Panel: Analog speedometer, fuel gauge, coolant temperature gauge, turn signal indicators, high beam indicator. Driver Assistance ABS: Not equipped on standard 2005 models. Connectivity Diagnostic Port: Available for electronic diagnostics (requires specific tools). 🔧 Maintenance Service Intervals Oil Change: Every 3,000 - 5,000 km or annually Spark Plug Replacement: Every 6,000 - 8,000 km (or as per manual) Air Filter Cleaning Or Replacement: Every 3,000 - 4,000 km Transmission Fluid Change: Every 10,000 - 12,000 km Brake Fluid Change: Every 2 years or as needed Coolant Change: Every 2 years or 4,000 - 6,000 km Fluid Specifications Engine Oil: 2-stroke synthetic oil (e.g., SAE 7.5W-40 or equivalent, check manual for specific API/JASO rating) Transmission Oil: SAE 80W-90 GL-3 or GL-4 hypoid gear oil Coolant: Ethylene glycol-based antifreeze coolant (50/50 mixture with distilled water) Brake Fluid: DOT 4 brake fluid Known Issues Common Problems: Carburetor clogging, stator failure, water pump seal leaks, CDI unit issues, weak starter motor. Preventative Measures: Regular cleaning of carburetor jets, checking electrical connections, timely coolant replacement, and using high-quality fuel and oil. 📚 Vehicle History Brand Heritage Manufacturer: Aprilia is an Italian manufacturer known for its high-performance motorcycles and scooters. Model Evolution Sr50 Lineage: The SR50 line has a long history, evolving through various engine configurations (air-cooled, liquid-cooled, carbureted, fuel-injected) and chassis updates to maintain its sporty appeal. Production Production Era: The SR50 model has been in continuous production since the early 1990s. Manufacturing Location: Italy 🏆 Awards & Recognition Recognitions Awards: The Aprilia SR50 range has historically been recognized for its sporty performance and handling within the 50cc scooter segment. Ratings User Reviews: Generally positive for performance, agility, and design, with some consistent mentions of maintenance requirements typical for high-performance 2-stroke engines.