🏷️ Basic Information Identification Make: Aprilia Model: RS 125 Year: 2005 Vehicle Type: Sportbike Motorcycle Engine Type: 2-Stroke Single Cylinder Codes Chassis Code: AP06 Engine Code Prefix: Rotax 122 👋 Introduction Market Position Segment: Lightweight Supersport Motorcycle. Target Demographic: Young riders, entry-level sportbike enthusiasts, those seeking agile performance. Competitive Analysis Key Competitors: Yamaha YZF-R125, Honda CBR125R, Suzuki GSX-R125 (later models), Kawasaki Ninja 125 (later models). Key Features Design Philosophy: Aggressive sportbike styling inspired by larger Aprilia RSV models, lightweight and agile handling. Performance Focus: High-revving 2-stroke engine offering spirited performance for its class. 📋 Manual Details Coverage Areas Coverage Scope: Comprehensive repair and service for Aprilia RS 125 (2005 model year). Target Audience: Professional Technicians and Advanced DIY Enthusiasts. Page Count Estimated Pages: 200+ Manual Type Type: Service Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Top-end, bottom-end, cooling, lubrication, fuel delivery (carburetor), exhaust. Transmission: Gearbox assembly, clutch operation, shift mechanism, lubrication. Electrical System: Ignition system (CDI), lighting, starting system, battery, charging system, wiring diagrams. Chassis: Frame, suspension (forks, rear shock), steering, wheels, brakes (front/rear). Bodywork: Fairings, seating, fuel tank, controls, instrumentation. Procedures Included Maintenance: Scheduled service intervals, oil changes, filter replacements, spark plug service, chain maintenance. Troubleshooting: Diagnostic procedures for common and uncommon issues, fault codes, symptom analysis. Repair: Detailed step-by-step instructions for component removal, disassembly, inspection, repair, and reassembly. Special Tools: Identification of required special tools for specific tasks. Technical Depth Depth: From basic fluid level checks and adjustments to complete engine rebuilds and electrical system diagnostics. 📊 Manual Specifications File Format Digital Format: PDF (Portable Document Format) Print Quality Printability: High-resolution, suitable for printing individual pages or the entire manual. Binding Type Binding For Print: Not Applicable (Digital Download) Paper Type Paper For Print: Not Applicable (Digital Download) Searchability Text Searchability: Searchable text fields for quick information retrieval. ⚙️ Engine Specifications Primary Engine Engine Manufacturer: Rotax Engine Design: Rotax 122, liquid-cooled, 2-stroke, single-cylinder with reed valve induction. Displacement: 124.8 cc Bore X Stroke: 54 mm x 54.5 mm Compression Ratio: 12.5:1 (approx.) Performance Horsepower Claimed: 30.8 HP (22.7 kW) @ 10500 rpm (for unrestricted models) Torque Claimed: 19.2 Nm (14.1 lb-ft) @ 9750 rpm (for unrestricted models) Fuel System Fuel Delivery: Dell'Orto PHBH 28 carburetor (or similar). Fuel Type: Unleaded gasoline, minimum 95 RON. Oil Mixture: Pre-mix or automatic oil injection system (depending on market variant). Cooling System Cooling Method: Liquid-cooled. Coolant Type: Ethylene glycol-based coolant with anti-corrosion additives. 🔧 Transmission Standard Type: 6-speed constant mesh sequential gearbox. Optional Optional Transmission: None. Features Clutch Type: Wet multi-plate clutch, cable-actuated. Final Drive: Chain drive. Gear Ratios: Specific gear ratios available within the manual. 📐 Dimensions Exterior Length: Approx. 1940 mm (76.4 in) Width: Approx. 730 mm (28.7 in) (at handlebars) Height: Approx. 1150 mm (45.3 in) (at handlebars) Wheelbase: Approx. 1345 mm (53.0 in) Seat Height: Approx. 805 mm (31.7 in) Weights Dry Weight: Approx. 131 kg (289 lbs) Wet Weight: Approx. 144 kg (317 lbs) (with fluids) Fuel Tank Capacity: 12.0 Liters (3.17 US gal) 🛡️ Safety Features Ratings Crash Test Ratings: Not Applicable for motorcycles in this era. Active Features Braking System Front: Single 320mm disc with 4-piston caliper. Braking System Rear: Single 210mm disc with 2-piston caliper. Suspension Front: 40mm upside-down (USD) telescopic forks, adjustable preload (on some variants). Suspension Rear: Monoshock with adjustable preload and rebound damping. Passive Features Lighting System: Halogen headlamp, LED tail lamp, incandescent turn signals. Instrumentation: Analog tachometer, digital speedometer, odometer, trip meter, coolant temperature warning. 💡 Technology Features Infotainment Infotainment System: Not Applicable (Basic motorcycle instrumentation). Driver Assistance Driver Assistance Features: ABS: Not available on this model year. Traction Control: Not available. Connectivity Connectivity Features: Not Applicable. 🔧 Maintenance Service Intervals Oil Change Interval: Refer to manual for specific intervals based on mileage or time (typically 3,000-5,000 km). Spark Plug Replacement: Refer to manual for specific intervals (typically 5,000-8,000 km). Chain Lubrication: Regularly, every 500-1000 km and after riding in wet conditions. Air Filter Cleaning: Refer to manual for cleaning/replacement intervals. Fluid Specifications Engine Oil Type: High-quality 2-stroke synthetic or semi-synthetic engine oil (specific API/JASO ratings in manual). Transmission Oil Type: SAE 75W/90 or SAE 10W/40 motorcycle gearbox oil (refer to manual for specific viscosity). Coolant Type: Ethylene glycol-based coolant, mixed 50/50 with distilled water. Brake Fluid Type: DOT 4 hydraulic brake fluid. Known Issues Common Wear Items: Clutch plates, exhaust valve mechanism (carbon buildup), ignition coils, wheel bearings. Typical Problems: Carburetor jetting sensitivity to altitude/temperature, potential for power valve sticking due to carbon, soft clutch feel if not adjusted. Troubleshooting Focus: Manual provides specific guidance on diagnosing and rectifying these common issues. 📚 Vehicle History Brand Heritage Manufacturer Origin: Aprilia is an Italian manufacturer with a strong heritage in motorcycle racing, particularly in smaller displacement categories. Model Evolution Rs 125 Lineage:...