🏷️ Basic Information Identification Make: Aprilia Model: RS 125 Model Code: RS125 (Rotax 122) Production Years Covered By Manual: 1993-2006 Codes Engine Code Series: Rotax 122 👋 Introduction Market Position Positioning: The Aprilia RS 125 was a highly regarded lightweight sports motorcycle, often positioned as a premium entry-level performance machine for young riders or those seeking track-day capability in a smaller displacement package. Known for its sharp styling and capable handling. Competitive Analysis Competitors: Competed against other 125cc two-stroke performance bikes of its era, such as the Yamaha TZR125, Honda NSR125R, and Cagiva Mito 125. Often considered a benchmark for handling and engine performance in its class. Key Features Features: Liquid-cooled 2-stroke engine, aggressive sportbike styling, capable chassis and suspension, powerful brakes for its class, high-revving performance. This manual provides the in-depth technical knowledge required to maintain and repair these performance-oriented features. 📋 Manual Details Coverage Areas Primary Coverage: Service, Repair, Maintenance, Overhaul, Diagnostics Secondary Coverage: Troubleshooting, Electrical Diagrams, Technical Data, Specifications Page Count Estimated Page Count: Approx. 400-600 pages (typical for comprehensive manuals of this era) Manual Type Type: Official Service Repair Workshop Manual Language Language: English (assumed based on product description and common availability) Format Format: Digital (PDF) - Often offered as a digital download for DIY users 📖 Manual Coverage Systems Covered Engine: Complete engine overhaul, top-end (cylinder, piston, head), bottom-end (crankshaft, con-rod, bearings), lubrication, cooling system, fuel delivery (carburetor, reed valve assembly), ignition system, exhaust system. Transmission: Gearbox disassembly and assembly, clutch operation and service, gear shift mechanism, lubrication. Chassis And Frame: Frame inspection and repair, suspension (front forks, rear shock absorber), steering system, swingarm. Brakes: Hydraulic system (master cylinders, calipers, lines), disc and pad service, bleeding procedures, rear drum brake (if applicable to certain variants). Electrical System: Wiring diagrams, lighting system, battery, charging system (alternator/stator, regulator/rectifier), starter system, ignition system components, instrument panel. Fuel System: Carburetor identification (e.g., Dell'Orto PHBH/VHSH), jetting, float bowl adjustment, fuel lines, fuel tap. Bodywork And Fairings: Fairing removal and installation, seat, fuel tank, body panel fasteners, decals. Wheels And Tires: Tire replacement, wheel bearing service, spoke tensioning (if applicable), rim maintenance. Procedures Included Maintenance: Scheduled maintenance intervals, oil changes, filter replacements, chain adjustment, brake pad inspection, spark plug replacement, air filter cleaning/replacement. Repair: Engine rebuild, gearbox repair, carburetor tuning, suspension overhaul, brake system repair, electrical component diagnosis and replacement. Troubleshooting: Diagnostic charts for common symptoms, identification of root causes for performance issues, electrical faults, and mechanical problems. Technical Data: Torque specifications for all fasteners, engine tolerances, valve clearances (if applicable to 2-stroke ports), fluid capacities, ignition timing settings, carburetor specifications. Technical Depth Depth: Comprehensive from basic owner maintenance to full engine and gearbox rebuilds. Includes detailed diagrams and step-by-step instructions for complex procedures. 📊 Manual Specifications File Format File Type: PDF Searchability: Likely text-searchable PDF for easy keyword finding. Print Quality Quality: High-resolution scans of original factory manual, ensuring clear text and legible diagrams. Binding Type Binding: N/A (Digital Format) Paper Type Paper Quality: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: 2-Stroke, Single Cylinder Engine Designation: Rotax 122 (often Rotax 122 EGS or Rotax 122 RX variants) Displacement: 124.8 cc Bore X Stroke: 54 mm x 54.5 mm Cooling System: Liquid-cooled Valvetrain: Reed valve intake, powervalve (Rotax's 'APTS' - Aprilia Performance Valve System or similar). Performance Horsepower Approximate: Approx. 30-35 HP (stock, depending on market and year, with variations for restricted versions) Torque Approximate: Approx. 22-25 Nm (stock) Fuel System Carburetor Type: Typically Dell'Orto PHBH 28/30 or VHSH 30 (specific model may vary by year/market) Fuel Type: Unleaded gasoline (min. 95 RON recommended) Premix Ratio: Typically 1:30 or 1:40 (specified by manufacturer, consult manual for exact ratio) Lubrication Lubrication Type: Separate oil injection system Engine Oil Type Injection: 2-stroke synthetic injector oil (e.g., Motul 710 2T, Castrol TTS, Mobil Racing 2T) Transmission Oil Type: 2-stroke gear oil / SAE 75W/80W (GL-3 or GL-4 specification, consult manual for precise OEM specification) 🔧 Transmission Standard Type: 6-speed Constant Mesh Optional Features: N/A (all models featured the 6-speed gearbox) Features Clutch Type: Wet, multi-plate 📐 Dimensions Exterior Length Approximate: Approx. 2000 mm Width Approximate: Approx. 720 mm Height Approximate: Approx. 1100 mm Wheelbase Approximate: Approx. 1370 mm Weights Dry Weight Approximate: Approx. 131 kg Wet Weight Approximate: Approx. 145 kg (with fluids) Fuel Tank Capacity: Approx. 7.5 Liters (some sources indicate 7.2L or 7.8L) 🛡️ Safety Features Ratings Crash Safety Ratings: Not applicable (motorcycle, not subject to automotive crash ratings) Active Features Braking System: Front: Dual hydraulic disc brakes (2x 280mm discs, typically with 4-piston calipers); Rear: Hydraulic disc brake (1x 220mm disc, typically with 2-piston caliper). ABS was not a standard feature on these models. Lighting: Halogen headlight, LED taillight/brake light, turn signals. Passive Features Frame Construction: Steel perimeter frame, designed for rigidity and handling. Rider Protection Considerations: The...