🏷️ Basic Information Identification Make: Aprilia Model: RS125 Model Year Start: 1993 Model Year End: 2003 Sub Model: Rotax 122 / Rotax 123 (depending on specific year/variant) 👋 Introduction Market Position Market Position: The Aprilia RS125 was a highly regarded lightweight sportbike, known for its sharp styling, agile handling, and performance that punched above its weight class. It served as an entry point into performance motorcycling for many riders, particularly in Europe. Competitive Analysis Competitors: Competed directly with other 125cc two-stroke sportbikes of the era, such as the Yamaha TZR125, Honda NSR125, Suzuki RG125, and Cagiva Mito 125. Key Features Key Features: Aggressive styling, excellent chassis dynamics, powerful two-stroke engine (for its class), sophisticated suspension and braking components. 📋 Manual Details Coverage Areas Covered Years: 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Vehicle Type: Sportbike Motorcycle Page Count Page Count: Estimated 300-400 pages (typical for comprehensive workshop manuals) Manual Type Manual Type: Workshop Manual / Service Manual / Repair Manual Language Language: English (typical for global distribution) Format Format: Digital Download (PDF) 📖 Manual Coverage Systems Covered Engine: Two-stroke engine overhaul, top end rebuild, bottom end assembly, cylinder, piston, rings, crankshaft, bearings, seals Fuel System: Carburetor tuning and rebuilding (e.g., Dell'Orto PHBH 28/30), fuel pump, fuel lines, fuel tank maintenance Cooling System: Radiator, water pump, thermostat, coolant flow, hoses, bleeding procedures Electrical Equipment: Ignition system (CDI, coil, spark plug), lighting, charging system (stator, regulator/rectifier), battery, starter motor, wiring diagrams, troubleshooting electrical faults Cycle Parts: Frame inspection, suspension (forks, rear shock absorber), steering head bearings, wheel bearings, brake system (hydraulic discs front and rear, master cylinders, calipers, pads, fluid), clutch system, chain and sprockets, exhaust system General Information: Vehicle identification numbers (VIN), general specifications, torque values, special tools, safety precautions Periodic Maintenance: Scheduled maintenance intervals, oil changes, filter replacements, chain lubrication, spark plug checks, brake fluid changes Procedures Included Repair Procedures: Step-by-step instructions for component disassembly, repair, reassembly, and adjustment Troubleshooting: Diagnostic charts and guides for identifying and resolving common problems Technical Data: Specifications, tolerances, clearances, and diagnostic data for all major components Technical Depth Depth: Comprehensive; covers from basic maintenance and fluid checks to complete engine and chassis overhauls 📊 Manual Specifications File Format File Format: PDF Searchability: Searchable text content for easy navigation and information retrieval Print Quality: High-resolution, printable pages with clear diagrams and text Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, two-stroke, single-cylinder Displacement: 124.8 cc (approximately) Bore X Stroke: 54 mm x 54.5 mm (typical for Rotax 122) Compression Ratio: 12.5:1 (typical, can vary slightly with model year) Power Output: Approximately 30-34 hp (22-25 kW) at 11,000 rpm (depending on homologation and restrictions for license classes) Torque: Approximately 18-20 Nm at 10,000 rpm Lubrication: Pre-mix or separate oil injection system (autolube) Fuel System Carburetor: Dell'Orto PHBH 28/30 AS or similar Fuel Type: Unleaded gasoline (min. 95 octane recommended) Cooling System Cooling Medium: Water/glycol mixture 🔧 Transmission Standard Transmission Type: 6-speed sequential manual gearbox Clutch: Wet multi-plate clutch Final Drive: Chain drive (520 pitch, typically) 📐 Dimensions Exterior Length: Approx. 1950 mm Width: Approx. 720 mm (at handlebars) Height: Approx. 1120 mm (at seat) Weights Dry Weight: Approx. 131 kg Wet Weight: Approx. 140 kg (with fluids) Fuel Capacity: Approx. 14 liters Seat Height: Approx. 810 mm 🛡️ Safety Features Active Features Braking System: Hydraulic disc brakes front and rear. Front typically a 320mm disc with a 4-piston caliper (e.g., Brembo or Grimeca), rear a 220mm disc with a 2-piston caliper. Tires Front: 110/70-17 Tires Rear: 150/60-17 Passive Features Lighting: Halogen headlight, LED taillight (depending on year/market), turn signals 💡 Technology Features Infotainment Instrument Cluster: Analog tachometer, speedometer, odometer, trip meter, coolant temperature warning light, oil warning light, neutral indicator. Driver Assistance ABS: Anti-lock Braking System (ABS) was not a standard feature on most RS125 models of this era, though it may have been an optional fitment on some later or specific market variants. 🔧 Maintenance Service Intervals Oil Change Interval: Engine oil (if applicable, for gearbox): every 5,000-7,000 km or annually. Gearbox oil: every 7,500-10,000 km. Spark Plug Replacement: Check every 2,500-5,000 km, replace as needed. Recommended type: NGK BR9EG or equivalent. Chain Maintenance: Lubricate and adjust chain every 500-1,000 km. Replace chain and sprockets typically between 15,000-30,000 km, depending on maintenance and riding conditions. Brake Fluid Flush: Every 12-24 months. Recommended fluid: DOT 4. Fluid Specifications Gearbox Oil: API GL-4, SAE 75W-90 or 80W-90 transmission oil. Capacity: approx. 0.8-1.0 liters. Coolant: Ethylene glycol-based coolant mixed with distilled water (50/50 ratio). Total capacity: approx. 1.5 liters. 2 Stroke Oil: High-quality synthetic 2-stroke oil (e.g., Motul 710, Castrol TTS). Use specifically for autolube system or pre-mix as per manual. Known Issues Common Issues: Worn power valve mechanism, sticky...