🏷️ Basic Information Identification Make: Aprilia Model: RS125 Year: 1999-2004 Model Variant: Sport Production (SP) Codes Chassis Code: AP06 Engine Code: Rotax 122 👋 Introduction Market Position Segment: Lightweight sportbike / Supersport motorcycle Target Audience: Enthusiast owners, amateur mechanics, aspiring racers looking for in-depth knowledge of the RS125. Competitive Analysis Key Competitors: Yamaha YZF-R125 (later models), Honda CBR125R, Suzuki GSX-R125, Cagiva Mito 125. Key Features Value Proposition: Provides comprehensive, factory-level technical information essential for maintaining and repairing the iconic Aprilia RS125. Manual Benefit: Empowers owners to perform tasks ranging from routine maintenance to complex repairs, saving costs and ensuring optimal performance. 📋 Manual Details Coverage Areas Manual Type: Workshop Repair Manual / Service Manual Language: English File Format: PDF Compatible Os: All Versions of Windows & Mac Required Software: Adobe PDF Reader 📖 Manual Coverage Systems Covered Engine: Complete engine overhaul, top-end and bottom-end rebuilds, component diagnostics, tuning. Covers Rotax 122 two-stroke engine. Fuel System: Carburetor (Dell'Orto PHBH 28) tuning and overhaul, fuel tank, fuel lines, fuel pump (if applicable), oil injection system. Cooling System: Radiator, coolant hoses, water pump, thermostat operation, coolant fluid specifications and bleeding procedures. Chassis: Frame, swingarm, rear suspension (monoshock), steering head bearings, front forks (upside-down), wheel bearing replacement. Electrical System: Wiring diagrams, lighting system, ignition system (CDI), battery maintenance, starter motor, charging system, fuses, switches. Brakes: Front and rear brake systems (disc brakes), caliper overhaul, brake fluid specifications, bleeding procedures, pad replacement. Bodywork: Fairing removal and installation, seat, fuel tank, minor body panel repairs. Procedures Included Maintenance: Routine checks, oil changes (premix or oil injection), spark plug replacement, air filter cleaning/replacement, chain adjustment and lubrication, brake checks. Troubleshooting: Diagnostic flowcharts for common running issues, electrical faults, starting problems, and performance inconsistencies. Repair: Detailed step-by-step instructions for component removal, disassembly, inspection, repair, and reassembly. Lubrication: Lubrication points, fluid types, capacities, and recommended service intervals for all major components. Tuning: Carburetor jetting guidance, ignition timing adjustments (where applicable), power valve operation. Technical Depth Depth Level: Comprehensive (covers basic maintenance to full engine rebuilds and advanced diagnostics). 📊 Manual Specifications File Format File Type: Digital (PDF) Searchability: Likely text-searchable, enabling quick access to specific information. Print Quality Print Readability: Designed for clarity and ease of use when printed, with professional layouts. Binding Type Digital Format: Not applicable (digital file) Paper Type Digital Format: Not applicable (digital file) ⚙️ Engine Specifications Primary Engine Engine Type: Rotax 122, 2-stroke, liquid-cooled, single-cylinder Displacement: 124.8 cc (7.6 cu in) Bore X Stroke: 54 mm x 54.5 mm (2.13 in x 2.15 in) Compression Ratio: 8.9:1 (typical, may vary by year/market) Power Valve System: Rotax Power Valve (RPV) system for improved low-end torque and top-end power. Performance Horsepower: Approx. 15 hp @ 8,750 rpm (learner legal); higher output in unrestricted models (e.g., 30+ hp). Torque: Approx. 11.8 Nm (8.7 lb-ft) @ 8,500 rpm (learner legal). Fuel System Carburetor: Dell'Orto PHBH 28 AS or similar (depending on market and emissions regulations). Fuel Type: Unleaded gasoline (RON 95 or higher recommended) Lubrication Oil System: Automatic oil injection (separate reservoir) or pre-mix (depending on model variant and region). 🔧 Transmission Standard Transmission Type: 6-speed constant mesh sequential gearbox Clutch: Wet, multi-plate clutch Features Gear Ratios: Specific ratios are detailed in the manual, typically optimized for sporty performance. Final Drive: Chain drive (typically 520 pitch) 📐 Dimensions Exterior Length: Approx. 1,950 mm (76.8 in) Width: Approx. 720 mm (28.3 in) Height: Approx. 1,135 mm (44.7 in) Wheelbase: Approx. 1,375 mm (54.1 in) Weights Dry Weight: Approx. 130 kg (286.6 lbs) Fuel Tank Capacity: Approx. 12 Liters (3.17 US gal) 🛡️ Safety Features Ratings Safety Standard: Meets relevant European (EC) and national safety standards for motorcycles of its class. Active Features Braking System: Dual disc front brake with radial calipers, single disc rear brake. Often equipped with braided steel brake lines. Suspension: Upside-down (USD) front forks, rear monoshock with adjustable preload and rebound damping (on some models). Passive Features Lighting: Halogen headlamp, LED taillight. 💡 Technology Features Infotainment Dashboard: Analog tachometer, speedometer, odometer, trip meter, coolant temperature gauge, and indicator lights. Driver Assistance N A: No electronic rider aids such as ABS or traction control typical for this era and class. Connectivity N A: No modern connectivity features. 🔧 Maintenance Service Intervals Oil Change Interval: Refer to manual; typically every 3,000-5,000 km or annually, depending on usage. For 2-stroke oil injection, check reservoir regularly. Spark Plug Replacement: Refer to manual; typically every 6,000-10,000 km. Chain Maintenance: Lubrication and adjustment every 500-1000 km, or more frequently in adverse conditions. Fluid Specifications Coolant Type: Ethylene glycol-based antifreeze coolant, 50% mix with distilled water. Brake Fluid Type: DOT 4 or DOT 5.1 brake fluid. Engine Oil Type: For 2-stroke oil injection: High-quality 2-stroke motorcycle oil (e.g., Motul 7100 2T, Castrol TTS). For pre-mix: Refer to manual for specific ratio and oil...