🏷️ Basic Information Identification Make: Aprilia Model: RS125 Year: 2002 Generation Generation Code: Second Generation (Rotax 122) Codes Chassis Code: AP871 👋 Introduction Market Position Positioning: Performance-oriented 125cc sportbike, popular for new riders and track day enthusiasts Competitive Analysis Competitors: Yamaha YZF-R125, Honda CBR125R, Suzuki GSX-R125, Kawasaki Ninja 125 (model year dependent) Key Features Features Of Vehicle: Aggressive styling, potent two-stroke engine for its class, advanced chassis and suspension for its era Value Proposition Of Manual: Enables owners to perform dealer-level maintenance and repairs, saving costs and increasing self-sufficiency 📋 Manual Details Coverage Areas Primary Coverage: Full Service, Repair, and Workshop Procedures Secondary Coverage: Troubleshooting, Maintenance, Diagnostics Page Count Estimated Page Count: Varies based on specific printing, but comprehensive in scope (typically 300-500+ pages for such detailed manuals) Manual Type Type: Workshop Service Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine: Complete engine disassembly, assembly, tuning, and specifications Fuel System: Carburetor (Dell'Orto PHBH/PHBL likely), fuel pump, fuel lines, tank maintenance Cooling System: Radiator, fan, thermostat, coolant fluid specifications, bleeding procedures Transmission: Gearbox, clutch, shift mechanism, lubrication, and adjustments Drive Chain And Sprockets: Inspection, adjustment, lubrication, replacement, and specifications Electrical System: Ignition system, lighting, battery, charging system, wiring harnesses, troubleshooting Chassis And Frame: Frame inspection, alignment, seat, bodywork, fairings, and plastics Suspension: Front forks (Marzocchi or similar), rear shock absorber, adjustments, rebuild procedures Brakes: Front and rear brake systems, caliper, master cylinder, fluid specifications, bleeding, pad replacement Steering System: Handlebar, steering head bearings, adjustments, lubrication Intake And Exhaust: Airbox, reed valve assembly, exhaust system components, tuning considerations Procedures Included Maintenance: Routine servicing, oil changes, filter replacements, spark plug checks, chain lubrication Troubleshooting: Systematic diagnostic steps for common and complex issues Repair: Step-by-step instructions for component repair and replacement Rebuild: Engine and major component rebuild procedures Adjustments: Carburetor, chain tension, clutch, suspension, and steering adjustments Diagnostics: Fault finding, error code interpretation (if applicable), electrical system diagnostics Technical Depth Depth: Comprehensive, covering basic maintenance to complete engine rebuilds and advanced troubleshooting Target Audience: DIY owners with basic mechanical skills and professional technicians 📊 Manual Specifications File Format Format: PDF Compatibility: All versions of Windows and Mac Viewing Requirements: Adobe PDF Reader Print Quality Printability: Yes, all pages are printable Output Quality: Clear text, diagrams, and illustrations suitable for garage use Binding Type Binding: Digital (PDF), not a physical binding Paper Type Paper Type: N/A (digital format) ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, two-stroke, single-cylinder Engine Code: Rotax 122 E (likely variant) Displacement: 124.8 cc Bore X Stroke: 54 mm x 54.5 mm Compression Ratio: Approx. 12.0:1 (varies slightly by variant) Power Output: Approx. 30-34 HP (depending on region and specific tuning, often derated for learner riders) Torque: Approx. 22-24 Nm Performance Redline: Approx. 10,000-11,000 RPM Fuel System Carburetor: Dell'Orto PHBH 28 (common fitment) Fuel Delivery: Two-stroke oil injection system, gravity-fed fuel from tank Fuel Type: Unleaded gasoline (RON 95 or higher recommended), Two-stroke engine oil 🔧 Transmission Standard Transmission Type: 6-speed constant mesh gearbox Optional Optional Gearboxes: N/A (standard for the model) Features Clutch Type: Wet, multi-plate, cable-actuated Final Drive: Chain drive 📐 Dimensions Exterior Length: Approx. 1950 mm Width: Approx. 720 mm Height: Approx. 1135 mm Wheelbase: Approx. 1345 mm Weights Dry Weight: Approx. 120-130 kg (depending on exact specification) Wet Weight: Approx. 135-145 kg 🛡️ Safety Features Ratings Safety Ratings: N/A (Motorcycles typically do not receive NCAP ratings) Active Features Braking System: Front: Single disc (260mm or 290mm, Brembo or Grimeca), Rear: Single disc (220mm) Tire Sizes: Front: 110/70-17, Rear: 150/60-17 (common fitment) Passive Features Lighting: Halogen headlight, LED taillight (often) Frame Construction: Aluminum twin-spar frame 💡 Technology Features Infotainment Infotainment System: N/A (Basic instrumentation: speedometer, tachometer, odometer, coolant temperature warning light) 🔧 Maintenance Service Intervals Oil Change: Every 3,000-5,000 km or annually (refer to manual for exact two-stroke oil type and interval) Spark Plug Check: Every 3,000-6,000 km Chain Lubrication: Every 500-1,000 km, or after washing/rain Air Filter Cleaning: Every 5,000-10,000 km (depending on operating conditions) Fluid Specifications Engine Oil Type: Specific two-stroke semi-synthetic or fully synthetic oil for premix or oil injection systems (e.g., Motul 710 2T, Castrol TTS) Coolant Type: Ethylene glycol-based coolant, 50% mixture with distilled water (e.g., Motul Motocool Expert) Brake Fluid Type: DOT 4 Gearbox Oil Type: API GL-4, SAE 75W/90 or 80W/90 synthetic gear oil (e.g., Motul Gear 300 75W-90, Castrol EPX 80W-90) Known Issues Common Issues: Carburetor jetting sensitivity to altitude/temperature, reed valve wear, power valve actuation issues (if equipped), clutch wear, exhaust valve cleaning/maintenance 📚 Vehicle History Brand Heritage Brand Origin: Italian manufacturer with a strong heritage in racing and sport motorcycles Model Evolution Rs125 Evolution: The RS125 has been a significant model for Aprilia, evolving from earlier Cagiva-derived designs to become a benchmark in the 125cc sportbike segment, known for its performance and...