🏷️ Basic Information Identification Make: Aprilia Model: RS 125 Year: 2006 Codes Chassis Code: AP8114423 👋 Introduction Market Position Segment: Lightweight Supersport Motorcycle Target Audience: Enthusiasts seeking performance and track-day capability in a 125cc class. Competitive Analysis Competitors: Yamaha YZF-R125, Cagiva Mito 125, Honda CBR125R. Key Features Design Philosophy: Race-inspired styling and handling for its class. Engine Type: High-performance two-stroke, liquid-cooled single-cylinder. 📋 Manual Details Coverage Areas Engine: Complete Engine Overhaul and Rebuild Transmission: Gearbox, Clutch, and Shift Mechanism Electrical System: Wiring Diagrams, Ignition, Lighting, Charging System Fuel System: Carburetion, Fuel Lines, Tank Maintenance Chassis: Frame, Suspension, Wheels, Brakes Bodywork: Fairings, Seat, Controls, Trim Cooling System: Radiator, Hoses, Thermostat Exhaust System: Pipework, Silencer, Catalytic Converter (if applicable) Braking System: Hydraulic System, Calipers, Discs, Master Cylinders Wheel Suspension: Front Forks, Rear Shock Absorber, Linkages Steering: Handlebars, Steering Head Bearings Troubleshooting: Diagnostic Charts and Solutions for Common Problems Page Count Page Count: 350+ Manual Type Manual Type: Factory Service Repair Manual Manual Purpose: Repair, Maintenance, Overhaul, Restoration Language Language: English Format Format: Downloadable PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Top-end rebuild (cylinder, piston, rings), bottom-end rebuild (crankshaft, bearings, con-rod), valve timing, de-carbonizing procedures. Fuel Carburetion: Detailed carburetor adjustment and rebuilding (Dell'Orto PHBH 28 VD), jetting information, fuel petcock operation. Ignition System: CDI ignition system testing and adjustment, spark plug specifications, troubleshooting ignition faults. Cooling System: Coolant type and capacity, bleeding procedures, thermostat function, radiator inspection and repair. Lubrication System: Two-stroke oil injection system operation and troubleshooting, oil type specifications. Transmission Gearbox: Clutch plate replacement, gear selector mechanism, gearbox oil type and capacity, shift drum and fork inspection. Brakes Hydraulics: Brake fluid type (DOT 4), bleeding procedures for front and rear brakes, master cylinder and caliper overhaul, disc and pad wear limits. Suspension Front: Front fork oil type and level, seal replacement, spring preload adjustment, damping characteristics. Suspension Rear: Rear shock absorber adjustment, linkage bearing service, spring replacement. Electrical Wiring: Comprehensive color-coded wiring diagrams, connector pinouts, component testing. Procedures Included Maintenance: Scheduled maintenance checks, routine inspections, cleaning procedures, lubrication points. Repair: Step-by-step instructions for component removal, installation, and repair. Rebuild: Complete engine and gearbox rebuild procedures with detailed component specifications. Troubleshooting: Diagnostic flowcharts for identifying and resolving mechanical and electrical issues. Calibration: Carburetor synchronization and idle speed adjustment, ignition timing checks. Inspection: Wear limits for critical engine and chassis components, visual inspection guidelines. Technical Depth Depth: Factory-level detail suitable for professional mechanics and experienced DIY enthusiasts. Diagnostics: Advanced diagnostic procedures for identifying complex issues beyond basic troubleshooting. Specifications: Precise torque values, clearances, fluid capacities, electrical resistance values, and component measurements. 📊 Manual Specifications File Format File Format: PDF Searchability: Fully searchable text content for quick information retrieval. Print Quality Print Quality: High-resolution, clear diagrams and text suitable for printing. Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code: Rotax 122 Engine Type: Liquid-cooled, 2-stroke, single-cylinder with reed valve induction and exhaust power valve (APDC). Bore X Stroke: 54 mm x 54.5 mm Displacement: 125 cc (124.8 cc) Compression Ratio: 12.4:1 (approximate, depending on variant) Power Output: Approx. 31 HP (23 kW) @ 11,000 rpm (derestricted European spec) Torque: Approx. 19 Nm (14 lb-ft) @ 10,500 rpm (derestricted European spec) Fuel System Carburetor Model: Dell'Orto PHBH 28 VD (or similar variant) Fuel Delivery: Carburetor with automatic choke and separate oil injection system. Recommended Fuel: Unleaded gasoline, minimum 95 RON. Oil Injection: Separate oil tank with automatic metered injection into intake. Spark Plug Spark Plug Type: NGK BR9EG or equivalent Power Valve Power Valve System: Aprilia Power Direct Cooling (APDC) exhaust powervalve for improved low-end torque and top-end power. 🔧 Transmission Standard Transmission Type: 6-speed constant mesh gearbox Features Clutch Type: Wet, multi-plate clutch, cable-actuated. Gear Ratios: Refer to manual for specific gear ratios (e.g., 1st: 11/34, 2nd: 14/30, 3rd: 17/27, 4th: 19/25, 5th: 21/24, 6th: 23/24) Final Drive: Chain drive, 13/48 sprocket ratio (typical, may vary). Fluid Specifications Gearbox Oil Type: SAE 75W/90 API GL-4 or GL-5 transmission oil. Fluid Capacity Gearbox Oil Capacity: Approx. 0.85 liters (refer to manual for exact capacity) 📐 Dimensions Exterior Length: Approx. 1950 mm Width: Approx. 730 mm (handlebar width) Height: Approx. 1100 mm (to top of screen) Weights Dry Weight: Approx. 120 kg Wet Weight: Approx. 135 kg (with all fluids) Capacities Fuel Tank Capacity: Approx. 11.5 liters (including 1.5 liter reserve) Coolant Capacity: Approx. 1.5 liters Chassis Frame Type: Aluminum alloy twin-spar frame Wheelbase Wheelbase: Approx. 1345 mm 🛡️ Safety Features Ratings Safety Features Availability: ABS not typically available on this model year. Active Features Braking System Type: Hydraulic disc brakes front and rear. Front Brake: 260 mm disc with twin-piston caliper (e.g., Brembo). Rear Brake: 220 mm disc with single-piston caliper (e.g., Brembo). Passive Features Lighting: Halogen headlamp, LED tail light....