🏷️ Basic Information Identification Make: Aprilia Model: RS125 Product Name: APRILIA RS125 Service Manual Repair Manual 1999-2003 Generation Production Years Covered: 1999, 2000, 2001, 2002, 2003 Codes Engine Code Association: Rotax 👋 Introduction Market Position Product Value Proposition: An inexpensive and comprehensive source for repair and service information, enabling owners to maintain their vehicles efficiently. Competitive Analysis Advantage Over Alternatives: Provides factory-level detail and accuracy, superior to generic repair guides, with instant download availability negating shipping delays and costs. Key Features Manual Enhancements: Detailed substeps, critical notes/cautions/warnings, numbered instructions, bold figure numbers for quick reference, and easy-to-navigate table of contents. Searchability: PDF format allows for digital searching of specific terms and procedures. 📋 Manual Details Coverage Areas Manual Type: Complete Official Full Factory Service Manual / Repair Manual / Shop Manual / Workshop Manual Language: English Format: Digital Download (PDF) Page Count Estimated Page Count: Hundreds of pages (printable) Manual Type Target Audience: Do-it-yourselfer (DIY) and Experienced Mechanic 📖 Manual Coverage Systems Covered Engine System: Complete engine disassembly, assembly, tuning, troubleshooting, and component specifications. Transmission System: Gearbox operation, clutch service, gear shift mechanism, and related components. Electrical System: Wiring diagrams, troubleshooting, ignition system, lighting, charging system, and starter motor. Fuel System: Carburetor (Dell'Orto PHBH/PHBL likely) service, fuel pump, fuel lines, and tank maintenance. Cooling System: Radiator, coolant, water pump, and associated hoses and components. Chassis And Suspension: Frame inspection, front fork (USD forks typical), rear shock absorber, swingarm, and steering head bearing service. Braking System: Front and rear brake caliper service, master cylinder, brake lines, fluid replacement, and pad/disc inspection. Wheel And Tire System: Wheel bearing service, tire mounting/balancing, and spoke tension adjustment (if applicable). Exhaust System: Exhaust pipe, muffler, and associated mounting hardware inspection and replacement. Bodywork And Fairings: Fairing removal, installation, and minor repair procedures. Procedures Included Preventative Maintenance: Detailed procedures for oil changes, filter replacements, chain adjustment, brake fluid flush, coolant checks, spark plug replacement, and general inspection. Troubleshooting: Diagnostic procedures for common and uncommon issues across all major systems, including no-start conditions, poor running, and electrical faults. Repair And Rebuild: Step-by-step instructions for complete disassembly and reassembly of engine components, transmission, suspension, and brakes. Electrical Diagnostics: In-depth analysis of wiring diagrams, continuity testing, voltage checks, and component diagnosis for electrical issues. Technical Depth Diagnostic Capabilities: Advanced diagnostics, including timing checks, compression testing, and carburetor jetting adjustments. Rebuild Level: Complete engine rebuilds, including piston, ring, cylinder, crankshaft, and bearing replacement. Illustrations And Diagrams: Hundreds of detailed illustrations, drawings, and photos, with enlarged insets for critical components. Instruction Format: Numbered step-by-step instructions, with detailed substeps, notes, cautions, and warnings. 📊 Manual Specifications File Format Digital Format: PDF (Portable Document Format) Compatibility: Windows PC, Mac Storage Options: Can be saved to hard drive, burned to CD-ROM. Print Quality Printable Pages: All pages are printable, allowing for custom printouts. Binding Type Digital Binding: N/A (Digital) Paper Type Digital Paper Type: N/A (Digital) ⚙️ Engine Specifications Primary Engine Engine Type: Two-stroke, single-cylinder Displacement: 124.8 cc (approx.) Bore X Stroke: 54 mm x 54.5 mm (typical for Rotax 122 engine variant) Cooling System: Liquid-cooled Ignition System: Electronic CDI (Capacitor Discharge Ignition) Performance Horsepower: Approximately 28-33 hp (depending on market and specific tuning) Torque: Approximately 2.0-2.3 kgf-m (14-16.5 lb-ft) Fuel System Carburetor Model: Typically Dell'Orto PHBH 28 or PHBL 26 (manual will specify for these years) Fuel Type: Unleaded gasoline with 2-stroke oil pre-mix or oil injection system. Engine Code Association Engine Family: Rotax 122 🔧 Transmission Standard Transmission Type: 6-speed constant mesh Optional Transmission Variants: N/A (Standard 6-speed for these models) Features Clutch Type: Wet, multi-plate Gear Ratios: Detailed in the manual, specific ratios vary by model year and region. Final Drive: Chain drive 📐 Dimensions Exterior Overall Length: Approx. 1980 mm (77.95 inches) Overall Width: Approx. 700 mm (27.56 inches) Seat Height: Approx. 805 mm (31.69 inches) Weights Dry Weight: Approx. 115 kg (253.5 lbs) Fuel Tank Capacity: Approx. 11 liters (2.9 US gallons) Wheelbase: Approx. 1345 mm (53 inches) 🛡️ Safety Features Ratings Safety Standards Compliance: Meets relevant European (e.g., EURO 1/2) and national motorcycle safety standards for its production period. Active Features Braking System: Front: 320mm single disc with 4-piston caliper (Brembo). Rear: 220mm single disc with 2-piston caliper (Brembo). Suspension Frontend: Upside-down (USD) telescopic forks, typically Marzocchi, with adjustable preload (specific adjustment details in manual). Suspension Backend: Monoshock with adjustable preload and rebound damping (specific adjustability in manual). Passive Features Lighting System: Halogen headlight, LED taillight (typical). 💡 Technology Features Infotainment Instrument Cluster: Analog tachometer, speedometer, odometer, trip meter, coolant temperature warning light, and neutral indicator. Driver Assistance Safety Systems: ABS was not a standard or common option on the RS125 during these model years. Primary safety features are the robust braking and suspension systems. Connectivity Connectivity Features: N/A (No modern connectivity features like Bluetooth or USB ports...