🏷️ Basic Information Identification Make: Aprilia Model: RS125 Generation: Rotax 122/123 Engine Era Production Years Covered: 1999, 2000, 2001, 2002, 2003, 2004 Codes Engine Code Primary: Rotax 122 (often Rotax 122/123 variants specific to RS125) 👋 Introduction Market Position Vehicle Class: Lightweight Supersport Motorcycle (125cc segment) Target Audience: Enthusiasts seeking a performance-oriented, stylish 125cc sportbike; riders holding A1 license or equivalent. Competitive Analysis Competitors: Yamaha YZF-R125, Honda CBR125R, Suzuki GSX-R125, Derbi GPR125. Key Features Vehicle Design: Aggressive, race-inspired styling with full fairings, dual headlights, and a sporty riding position. Engine Performance: High-revving two-stroke engine renowned for its performance in the 125cc class, delivering a strong power-to-weight ratio. Key Features Manual Value Proposition: Empowers owners to perform comprehensive maintenance and repairs, saving on labor costs and ensuring optimal performance and longevity of the Aprilia RS125. Expertise Level: Provides detailed insights suitable for both novice DIY mechanics and experienced technicians. 📋 Manual Details Coverage Areas Manual Type: Digital Workshop Repair Manual Language: English Format: Digital (likely PDF or similar e-book format) Page Count: Detailed, typically hundreds of pages for comprehensive coverage Completeness: Comprehensive, covering all diagnostic and repair procedures 📖 Manual Coverage Systems Covered Engine: Complete engine overhaul, top-end rebuild (cylinder, piston, head), bottom-end assembly (crankshaft, connecting rod, bearings), cooling system, lubrication system, fuel and ignition systems, carburetor tuning and overhaul, exhaust system. Transmission: Gearbox disassembly and reassembly, clutch service and adjustment, shift mechanism, gear ratios, lubrication. Chassis And Frame: Frame inspection, swingarm, rear suspension linkages, front fork disassembly and service, steering head bearings, wheel bearings, wheel assembly and truing. Brakes: Front and rear brake caliper service and overhaul, master cylinder service, brake fluid bleeding, brake pad replacement, disc inspection, brake line routing. Electrical System: Wiring diagrams, ignition system components (CDI, stator, coil), lighting circuits, battery maintenance, starter system, instrument cluster troubleshooting, sensor identification. Fuel System: Carburetor (Dell'Orto PHBH 28 AS or similar), fuel pump (if applicable), fuel lines, fuel tank maintenance. Cooling System: Radiator service, coolant replacement, water pump overhaul, thermostat operation. Bodywork And Fairings: Fairing removal and installation, seat, fuel tank replacement, minor body repairs. Procedures Included Maintenance: Regular servicing, oil changes, spark plug replacement, air filter cleaning/replacement, chain lubrication and adjustment, brake fluid flush, coolant flush, carburetor cleaning and synchronization. Troubleshooting: Diagnostic charts for common issues, electrical fault finding, engine performance problems, starting difficulties. Repair: Complete engine rebuild, suspension overhaul, brake system repair, electrical component replacement, carburetor rebuild, clutch replacement. Rebuild: Detailed step-by-step instructions for major component rebuilds. Restoration: Guidance on refurbishing and restoring older components. Technical Depth Depth Level: Advanced diagnostics and comprehensive repair procedures, suitable for professional mechanics and experienced enthusiasts. 📊 Manual Specifications File Format Digital Format: Typically PDF, optimized for digital viewing and printing. Searchability: Likely text-searchable for quick information retrieval. Print Quality Illustrations: High-quality diagrams, schematics, and photographs to illustrate procedures. Binding Type Binding: N/A (Digital format) Paper Type Paper Quality: N/A (Digital format) ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, two-stroke, single-cylinder Engine Displacement: 125cc (approximately) Bore X Stroke: Typically 54 mm x 54.5 mm (Rotax 122) Compression Ratio: Varies, often around 12.5:1 or higher Cooling System: Pressurized liquid cooling system with radiator and fan. Lubrication System: Premix or Automatic Oil Injection (depending on specific model variant within the years). Performance Max Horsepower: Around 28-34 hp at the crankshaft (subject to regional restrictions and specific model tuning). Max Torque: Approximately 18-22 Nm (subject to specific model). Fuel System Carburetor Type: Dell'Orto PHBH 28 AS or similar 28mm flat-slide carburetor. Fuel Type: Unleaded gasoline (RON 95 or higher recommended) Ignition Ignition System: Electronic CDI ignition system with variable ignition timing. Spark Plug Type: NGK BR9EG or equivalent. 🔧 Transmission Standard Transmission Type: 6-speed constant mesh, sequential manual transmission. Optional Optional Transmission: N/A (Standard manual transmission only for RS125). Features Clutch Type: Wet multi-plate clutch. Gear Ratios: Specific gear ratios are detailed in the manual for optimal performance tuning. Final Drive: Chain drive. 📐 Dimensions Exterior Length: Approximately 1950 mm Width: Approximately 720 mm Height: Approximately 1135 mm Wheelbase: Approximately 1375 mm Seat Height: Approximately 805 mm Cargo Cargo Capacity: N/A (Motorcycle) Weights Dry Weight: Approximately 120-130 kg (depending on specific trim and equipment). Gross Weight Capacity: Typically around 280-300 kg (GVWR including rider and passenger). 🛡️ Safety Features Ratings Crash Test Ratings: N/A (Motorcycles are not typically rated by automotive crash safety organizations). Active Features Braking System: Dual-piston caliper front brake with a ventilated disc, single-piston caliper rear brake with a ventilated disc. Tires Front: 110/70-17 Tires Rear: 140/70-17 Passive Features Lighting: Halogen headlights, LED taillight. Mirrors: Aerodynamic mirrors with integrated turn signals (on some variants). 💡 Technology Features Infotainment Infotainment System: N/A (Basic motorcycle instrumentation). Driver Assistance Driver Assistance Systems: N/A (No electronic rider aids like ABS or traction control on most models of this era). Instrumentation Instrument Cluster: Analog tachometer, speedometer,...