🏷️ Basic Information Identification Make: Aprilia Model: RS4 50 Product Name: Aprilia RS4 50 Complete Workshop Service Repair Manual Generation Covered Years: 2011, 2012, 2013, 2014 👋 Introduction Market Position Positioning: Entry-level sportbike segment, appealing to younger riders and those seeking accessible performance. Competitive Analysis Competitors: Yamaha YZF-R125, Suzuki GSX-R125, Kawasaki Ninja 125 (though model years may vary). Key Features Design Philosophy: Sportbike styling derived from larger Aprilia models, emphasizing aggressive aesthetics and rider engagement. Target Audience: Beginner riders, learner riders, those looking for a stylish and economical commuter or track day starter. 📋 Manual Details Coverage Areas Overall Coverage: Comprehensive service and repair procedures A-Z Page Count Estimated Pages: Likely 300-600 pages (typical for comprehensive motorcycle service manuals) Manual Type Type: Workshop Service Repair Manual Language Language: English Format Format: Downloadable Digital Format (PDF compatible) 📖 Manual Coverage Systems Covered Engine System: Engine disassembly, assembly, tuning, diagnosis, and repair. Fuel System: Carburetor/fuel injection system, fuel pump, fuel filter, fuel tank service. Ignition System: Ignition timing, spark plugs, ignition coil, CDI unit diagnosis. Cooling System: Radiator, water pump, thermostat, coolant flow, pressure testing. Transmission System: Clutch operation, gearbox disassembly and assembly, gear ratios, maintenance. Chassis System: Frame inspection, swingarm, linkages, bearings. Suspension System: Front forks (fork oil change, seal replacement, damping adjustments), rear shock absorber. Braking System: Brake fluid replacement, caliper service, master cylinder repair, pad and disc replacement. Electrical System: Wiring diagrams, battery service, lighting, starter motor, charging system (stator, regulator/rectifier). Exhaust System: Exhaust pipe, muffler, and related component service. Bodywork: Fairing removal and installation, seat, fuel tank, and accessory mounting. Wheels And Tires: Tire replacement, wheel balancing, rim service. Procedures Included Routine Maintenance: Oil changes, filter replacements, chain adjustment, spark plug replacement, fluid checks. Troubleshooting: Diagnostic charts and common problem resolution. Repair Procedures: Step-by-step instructions for all major component repairs and replacements. Disassembly Assembly: Detailed guides for taking apart and reassembling all vehicle systems. Specifications And Torques: Crucial torque values for fasteners, fluid capacities, and clearances. Wiring Diagrams: Color-coded and detailed electrical schematics. Technical Depth Depth: Comprehensive, suitable for DIY enthusiasts and professional mechanics. 📊 Manual Specifications File Format Format Details: Digital PDF; compatible with PC, Mac, tablets, and smartphones. Print Quality Printability: High-resolution for clear printing of individual pages or entire manual. Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Single-cylinder, two-stroke (common for 50cc sportbikes of this era, though 4-stroke variants exist) Displacement: Approximately 49.7 cc Bore X Stroke: Specifics vary by exact engine variant; typical for 50cc would be around 39.5mm x 40.3mm Cooling System: Liquid-cooled Valve Train: Reed valve induction (2-stroke) Performance Horsepower Approx: Approximately 10-15 hp (subject to regional restrictions and specific model tuning) Torque Approx: Approximately 7-9 Nm Fuel System Fuel Delivery: Carburetor (e.g., Dell'Orto PHVA 17.5mm) Fuel Type: Unleaded gasoline (95 RON recommended) Oil System Oil Mixing: Automatic oil injection system (for 2-stroke engines) 🔧 Transmission Standard Transmission Type: 6-speed manual transmission Optional Optional Transmissions: N/A (typically single transmission option for this model) Features Clutch Type: Wet multi-plate clutch 📐 Dimensions Exterior Length: Approx. 1980 mm Width: Approx. 750 mm Height: Approx. 1130 mm Weights Dry Weight: Approx. 125 kg Wet Weight: Approx. 137 kg (with fluids) Capacities Fuel Tank Capacity: Approx. 10 Liters Coolant Capacity: Approx. 0.8 Liters 🛡️ Safety Features Ratings Safety Ratings: N/A (Motorcycle safety is assessed by specific component performance and rider skill, not standardized vehicle ratings like cars). Active Features Braking System: Hydraulic disc brakes front and rear. Front Brake Spec: 264 mm disc, 4-piston caliper Rear Brake Spec: 220 mm disc, 2-piston caliper Passive Features Lighting: Halogen headlight, LED taillight. 💡 Technology Features Infotainment Instrument Cluster: Analog tachometer, digital speedometer, odometer, trip meter, fuel gauge (basic digital display). Driver Assistance Assistance Features: N/A (No electronic rider aids typically found on this class of motorcycle). 🔧 Maintenance Service Intervals Engine Oil Change: Every 3,000-5,000 km or annually (refer to specific manual for exact interval). Spark Plug Replacement: Every 5,000-10,000 km (depending on plug type and wear). Chain Adjustment Lubrication: Every 500-1000 km or as needed based on slack and cleanliness. Air Filter Cleaning: Every 3,000-6,000 km or more frequently in dusty conditions. Fluid Specifications Engine Oil: 2-stroke premix oil (specific API TC, JASO FD approved) Transmission Oil: SAE 10W/40 API GL-3 or GL-4 transmission oil (e.g., Motul Gear 300 10W-40) Coolant: Ethylene glycol-based coolant with corrosion inhibitors (50% mix with distilled water). Brake Fluid: DOT 4 brake fluid. Known Issues Common Wear Items: Clutch plates, spark plugs, tires, fork seals, chain and sprockets. Electrical Reliability: Occasional issues with rectifier/regulator or stator can occur with age, check wiring connections. 2 Stroke Maintenance: Requires diligent attention to oil levels and regular decoking of exhaust ports and piston crown to prevent carbon buildup. 📚 Vehicle History Brand...