🏷️ Basic Information Identification Make: Aprilia Model: RS 125 Codes Chassis Code Range: RP (Rotax 122 variant), MK (later models) 👋 Introduction Market Position Segment: Lightweight sportbike, performance-oriented 125cc class Competitive Analysis Competitors: Yamaha YZF-R125 (later), Honda CBR125R (later), Cagiva Mito, Suzuki GSX-R125 (later) Key Features Design Philosophy: Race-inspired styling, aggressive ergonomics, potent 2-stroke performance 📋 Manual Details Coverage Areas Applicable Years: 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 Page Count Estimated Pages: 300-500 (typical for comprehensive service manuals of this era) Manual Type Type: Service Repair Manual Language Language: English Format Format: Digital (likely PDF) 📖 Manual Coverage Systems Covered Engine: 2-stroke single-cylinder, Rotax 122 engine (including top end, bottom end, cooling, lubrication, fuel and exhaust systems) Transmission: 6-speed gearbox, clutch system, lubrication Fuel System: Carburetor (Dell'Orto PHBH/PHVA variants), reed valve induction, oil injection system Electrical System: Ignition system (CDI), lighting, starting system, battery, charging system (stator/rotor), wiring diagrams Chassis Suspension: Front telescopic forks (e.g., Paioli, Marzocchi), rear monoshock suspension (e.g., Sachs), swingarm Braking System: Front disc brakes (e.g., Brembo, Grimeca), rear disc brakes, hydraulic lines, master cylinders, calipers Wheel Tires: Wheel bearing inspection and replacement, tire pressure, wheel balancing Bodywork: Fairing removal and installation, seat, fuel tank, plastics Exhaust System: Expansion chamber, muffler, packing replacement Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, chain adjustment, spark plug replacement, decarbonization Troubleshooting: Diagnostic procedures for common issues, symptom-based troubleshooting guides Repair: Engine rebuild, transmission overhaul, suspension fork service, brake caliper rebuild, electrical component repair Assembly Disassembly: Step-by-step instructions for dismantling and reassembling major components Engine Tuning: Carburetor jetting, exhaust modifications (basic tuning advice might be present) Suspension Adjustment: Fork preload/rebound adjustments (if applicable), rear shock adjustments Technical Depth Depth: Comprehensive (covering routine maintenance to complete engine and chassis overhauls) Diagnostic Charts: Detailed fault-finding flowcharts for electrical and mechanical issues Torque Specifications: Precise torque values for critical fasteners across all systems 📊 Manual Specifications File Format File Type: PDF Print Quality Print Readability: High-resolution scans, clear text and diagrams Binding Type Binding: Not applicable (digital format) Paper Type Paper Quality: Not applicable (digital format) ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, 2-stroke, single-cylinder Engine Displacement: 124.8 cc (approx.) Bore X Stroke: 54 mm x 54.5 mm (typical for Rotax 122) Compression Ratio: 12.0:1 to 13.5:1 (varies slightly by year/tune) Power Output: Approx. 30-34 HP (depending on market regulations and tune) Torque: Approx. 20-23 Nm (depending on market regulations and tune) Performance Top Speed Potential: 140-160 km/h (approx.) Power Delivery: Characterized by strong mid-range and top-end power delivery typical of a high-performance 2-stroke Fuel System Carburetor Type: Dell'Orto PHBH 28/30/32 (common variants) Fuel Type Recommendation: Unleaded gasoline (min. 95 RON), 2-stroke premix oil (e.g., Castrol TTS, Motul 710) Oil Injection: Automatic premix system Cooling System Cooling Method: Liquid-cooled Coolant Type: Ethylene glycol-based coolant (e.g., 50% coolant, 50% distilled water) 🔧 Transmission Standard Gearbox: 6-speed constant mesh Clutch Type: Wet multi-plate Features Transmission Fluid: 10W-40 motorcycle gear oil (API SG or higher, JASO MA) Transmission Fluid Capacity: Approx. 0.7 - 0.8 liters 📐 Dimensions Exterior Length: Approx. 1970 mm Width: Approx. 700 mm Height: Approx. 1135 mm Wheelbase: Approx. 1370 mm Weights Dry Weight: Approx. 130-140 kg Fuel Tank Capacity: Approx. 11 liters (including reserve) 🛡️ Safety Features Ratings Safety Standards: Designed to meet relevant European motorcycle safety standards of the era Active Features Brakes: Dual disc front, single disc rear with hydraulic actuation Passive Features Lighting: Halogen headlight, taillight, turn signals 💡 Technology Features Infotainment Instrumentation: Analog tachometer, speedometer, odometer, trip meter, coolant temperature gauge (some models) Driver Assistance ABS: Not typically equipped on models within this production range. Connectivity Features: No electronic connectivity features. 🔧 Maintenance Service Intervals Oil Change Frequency: Every 3,000-5,000 km or annually (refer to manual for specific intervals) Spark Plug Replacement: Every 5,000-7,500 km (depending on usage and plug type) Chain Lubrication Adjustment: Every 500-1000 km or after washing/wet conditions Fluid Specifications Brake Fluid Type: DOT 4 Fork Oil Type: SAE 5W or 10W (check manual for specific grade and quantity) Engine Oil Type: High-quality 2-stroke premix oil, specifically designed for high-performance liquid-cooled engines. Known Issues Common Wear Items: Piston rings, reed valves, clutch plates, fork seals, exhaust packing Electrical Gremlins: Wiring harness degradation, rectifier issues (common on older bikes) Cooling System: Radiator leaks, thermostat issues, water pump seal wear 📚 Vehicle History Brand Heritage Manufacturer Origin: Aprilia S.p.A., Italy Model Evolution Rs 125 Lineage: Evolved from earlier Aprilia 125cc models, becoming a benchmark for performance in its class Rotax Engine Adoption: Primarily utilized the renowned Rotax 122 engine, known for its power and reliability in 125cc racing. Production Production Period: Mid-1990s to mid-2000s