🏷️ Basic Information Identification Make: Aprilia Model: RS 125 Generation: Second Generation (2005-2010) Codes Model Code Range: Typically AP8114451 to AP8114488 (for relevant years) 👋 Introduction Market Position Segment: Lightweight sportbike, often used for track days, commuting, and entry-level performance riding. Target Audience: Enthusiasts, owners, and mechanics seeking in-depth knowledge for maintenance and repair. Competitive Analysis Key Competitors: Yamaha YZF-R125, Honda CBR125R, Kawasaki Ninja 125 (depending on market availability for specific years). Key Features Vehicle Styling: Aggressive, race-inspired styling mimicking larger Aprilia sportbikes. Performance: Excellent power-to-weight ratio for its class, agile handling. Key Features Manual Essential Resource: Crucial for maintaining optimal performance and longevity of the Aprilia RS 125. Diagnostic Capability: Enables efficient troubleshooting of mechanical and electrical issues. 📋 Manual Details Coverage Areas Covered Years: 2005, 2006, 2007, 2008, 2009 Included Regions: Global, specific regional variations may exist but core technical data is universal. Page Count Total Pages: Hundreds (exact count varies by specific publication, typically 300-500+ pages) Manual Type Type: Workshop Manual / Service Manual / Repair Manual Language Language: English (typically, can vary by region; common versions are Italian, German, French) Format Format: Digital (PDF) and/or Printed Book 📖 Manual Coverage Systems Covered Engine: Full engine disassembly, assembly, tuning, troubleshooting, piston, cylinder, crankshaft, connecting rod, valve timing, lubrication, cooling. Fuel System: Carburetor (Dell'Orto PHBH, PHVA), fuel pump, fuel lines, fuel tank, troubleshooting fuel delivery issues. Exhaust System: Exhaust pipe, silencer, expansion chamber design principles (two-stroke), mounting, sealing. Cooling System: Liquid cooling system, radiator, water pump, thermostat, hoses, coolant specifications, bleeding procedure. Lubrication System: Two-stroke oil injection system, oil pump, oil reservoir, oil specifications, troubleshooting oil delivery. Chassis: Frame inspection and repair, swingarm, rear suspension linkage, bearings, steering head bearings. Front Suspension: Telescopic front forks (Marzocchi or Paioli), fork oil type and level, seal replacement, spring rates, damping adjustments. Rear Suspension: Monoshock rear suspension, shock absorber adjustment, linkage maintenance, bushing replacement. Braking System: Front and rear disc brakes, brake caliper service, master cylinder, brake fluid type and bleeding, pad replacement, rotor specifications. Electrical System: Wiring diagrams, ignition system (CDI), lighting, starter motor, battery, fuses, switches, instrument cluster. Wheels Tires: Wheel bearing maintenance, tire types and sizes, inflation pressures, wheel balancing. Procedures Included Periodic Maintenance: Scheduled maintenance intervals, oil changes, filter replacements, chain adjustment, spark plug checks. Service Repairs: Step-by-step instructions for all major mechanical and electrical repairs. Troubleshooting: Diagnostic charts and procedures for identifying and resolving common problems. Engine Rebuild: Complete engine overhaul procedures, including disassembly, cleaning, inspection, and reassembly. Suspension Tuning: Instructions for adjusting and servicing front and rear suspension components. Carburetor Adjustment: Detailed procedures for setting idle speed, mixture, and float levels. Electrical Diagnostics: Wiring diagrams interpretation and fault finding for electrical issues. Technical Depth Depth: Comprehensive, suitable for professional mechanics and experienced DIY enthusiasts. Diagrams Illustrations: Hundreds of detailed exploded views, schematics, and step-by-step illustrations. Torque Specifications: All critical torque values for fasteners and engine components. Clearances Tolerances: Precise specifications for engine component clearances and wear tolerances. 📊 Manual Specifications File Format Digital Format: PDF (Searchable text, high-resolution images) Print Quality Print Quality: High-resolution, suitable for clear reproduction of diagrams and text. Binding Type Binding Type: Spiral-bound or perfect bound (for printed versions) for lay-flat use. Paper Type Paper Type: Durable, gloss or semi-gloss paper (for printed versions) to withstand shop environment. ⚙️ Engine Specifications Primary Engine Engine Type: Two-stroke, single-cylinder Displacement: 124.8 cc (125cc class) Bore X Stroke: 54 mm x 54.5 mm Cooling System: Liquid-cooled Ignition: Electronic ignition (CDI) Valvetrain: Reed valve induction, Rotary Disc Valve (intake) Performance Horsepower: Approx. 30-33 hp (depending on country regulations and specific tuning, often restricted in some markets) Torque: Approx. 2.3-2.5 kgm (16.6-18.1 ft-lbs) Compression Ratio: Typically around 12.5:1 Fuel System Carburetor: Dell'Orto PHBH 28 / PHVA 28 (variable by year/market) Fuel Type: Unleaded gasoline (minimum 95 RON recommended for optimal performance) Oil Injection: Automatic two-stroke oil injection system Oil Type: API TC, JASO FD compliant two-stroke motorcycle oil 🔧 Transmission Standard Type: 6-speed constant mesh Clutch: Wet, multi-plate Final Drive: Chain drive Features Gear Ratios: Specific ratios detailed in the manual, crucial for performance tuning. Transmission Oil Type: API GL-4 or GL-5 gear oil (e.g., Motul Gear 75W-90) Transmission Oil Capacity: Approx. 0.75 liters 📐 Dimensions Exterior Length: Approx. 1945 mm Width: Approx. 760 mm Height: Approx. 1055 mm Wheelbase: Approx. 1345 mm Seat Height: Approx. 805 mm Weights Dry Weight: Approx. 120 kg Wet Weight: Approx. 137 kg (with fluids) Fuel Tank Capacity: Approx. 13 liters Oil Tank Capacity: Approx. 1.5 liters 🛡️ Safety Features Ratings Crash Test Results: Motorcycles of this class are not typically subjected to standardized car crash tests. Safety relies on rider skill and protective gear. Active Features Braking: Disc brakes front and rear for effective stopping power. Handling: Agile chassis and suspension designed for responsive handling and maneuverability. Passive Features...