🏷️ Basic Information Identification Make: Aprilia Model: RS 125 Year: 2004 Type: Sportbike 👋 Introduction Market Position Positioning: The Aprilia RS 125 is a highly regarded entry-level sportbike, known for its sharp styling, track-inspired handling, and performance that punches above its weight class. It caters to younger riders, aspiring racers, and those seeking an engaging riding experience in a lightweight package. Competitive Analysis Competitors: Direct competitors in its era included models like the Yamaha YZF-R125, Honda CBR125R, and KTM RC 125, all vying for dominance in the premium 125cc sportbike segment. Key Features Features: Aggressive sportbike styling, perimeter frame, potent two-stroke engine, capable suspension, and strong braking performance, all contributing to its sporty demeanor. 📋 Manual Details Coverage Areas Engine: Yes Transmission: Yes Chassis: Yes Electrical System: Yes Bodywork: Yes Suspension: Yes Brakes: Yes Fuel System: Yes Cooling System: Yes Exhaust System: Yes Troubleshooting: Yes Maintenance Procedures: Yes Engine Rebuild: Yes Wiring Diagrams: Yes Page Count Page Count: Extensive (specific count not provided, but implied comprehensive) Manual Type Manual Type: Repair Service Manual Language Language: English (implied by product description) Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanical: Detailed disassembly, assembly, inspection, and repair of all engine components including crankshaft, connecting rods, pistons, cylinders, valves, and camshafts. Engine Management: Carburetor tuning, adjustment, and overhaul. Ignition system diagnosis and repair. Fuel and oil delivery systems. Transmission And Drivetrain: Clutch operation, adjustment, and replacement. Gearbox inspection, disassembly, and reassembly. Chain and sprocket maintenance. Brake System: Hydraulic brake system components, fluid replacement, bleeding procedures, caliper and master cylinder servicing, pad and disc replacement. Suspension And Steering: Front fork servicing, seal replacement, oil levels. Rear shock absorber inspection and adjustment. Steering head bearing maintenance and adjustment. Electrical System: Wiring diagrams for all circuits, battery maintenance, charging system (stator and regulator/rectifier), lighting, ignition, and instrumentation. Cooling System: Radiator, coolant hoses, water pump, and thermostat inspection and replacement. Coolant type and capacity specifications. Fuel And Lubrication: Fuel tank, lines, and petcock maintenance. Two-stroke oil injection system diagnosis and servicing. Oil specifications and mixing ratios. Bodywork And Frame: Fairing removal and installation, seat, fuel tank mounting, frame inspection, and related components. Procedures Included Routine Maintenance: Oil changes, filter replacements, chain lubrication and adjustment, brake fluid checks, tire pressure checks, spark plug inspection. Scheduled Maintenance: Detailed service intervals for all major components and systems. Diagnostic Procedures: Troubleshooting guides for common issues, electrical fault finding, and mechanical problem diagnosis. Component Overhaul: Step-by-step instructions for rebuilding the engine, gearbox, carburetor, and brake system components. Adjustments: Carburetor jetting and idle speed adjustments, clutch cable adjustment, throttle cable adjustment, suspension sag adjustments. Special Tool Usage: Identification and recommended usage of specialized tools required for certain procedures. Technical Depth Depth: Professional Technician Level, covering full rebuilds, advanced diagnostics, and detailed specifications. 📊 Manual Specifications File Format File Format: PDF Searchable Text: Yes (typical for professional PDF manuals) Print Quality Quality: High-resolution, clear diagrams and text Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, two-stroke, single-cylinder Displacement: 124.8 cc (7.6 cu in) Bore X Stroke: 54 mm x 54.5 mm Compression Ratio: 12.4:1 (typical for this era) Power Output: Approx. 31-34 HP (23-25 kW) at 10,500 rpm (varies by market regulations) Torque: Approx. 19.2 Nm (14.2 lb-ft) at 10,000 rpm Lubrication: Pre-mix or separate oil injection system Performance Top Speed: Approx. 100-115 mph (160-185 km/h) Fuel System Fuel Delivery: Dell'Orto PHBH 28 (or similar model) carburetor Fuel Type: Unleaded gasoline, minimum 95 RON Fuel Tank Capacity: Approx. 13 Liters (3.4 US gal) 🔧 Transmission Standard Transmission Type: 6-speed constant mesh Features Clutch Type: Wet, multi-plate, cable-actuated Final Drive: Chain drive 📐 Dimensions Exterior Length: Approx. 1950 mm (76.8 in) Width: Approx. 740 mm (29.1 in) Height: Approx. 1070 mm (42.1 in) (seat height) Wheelbase: Approx. 1360 mm (53.5 in) Weights Dry Weight: Approx. 140 kg (308.6 lbs) Wet Weight: Approx. 155 kg (341.7 lbs) 🛡️ Safety Features Ratings Safety Ratings: N/A (Motorcycle safety is typically assessed through independent reviews and rider experience rather than formal crash test ratings like cars). Active Features Active Safety: Effective dual-disc front brakes and single rear disc brakes for strong stopping power. Responsive handling and chassis geometry. Passive Features Passive Safety: Perimeter frame design offering good rigidity and crash protection for the engine. Sportbike ergonomics can aid rider control. 💡 Technology Features Infotainment Infotainment System: Basic analogue instrumentation: speedometer, tachometer, odometer, trip meter, and essential indicator lights (neutral, turn signals, oil level, high beam). Driver Assistance Driver Assistance Features: N/A (Motorcycle of this era does not feature electronic driver assistance systems). 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000-5,000 km (2,000-3,000 miles) or annually, depending on usage (engine oil for gearbox). Spark Plug Check: Every 3,000-5,000 km (2,000-3,000 miles) Air Filter Cleaning: Every...