🏷️ Basic Information Identification Make: Aprilia Model: RS125 Codes Model Code Range: Rotax 123 (pre-2000), Rotax 122 (2000-2002) 👋 Introduction Market Position Positioning: The Aprilia RS125 was a popular entry-level sportbike, offering performance and styling competitive with larger displacement machines. This manual caters to owners and independent mechanics seeking detailed information for maintenance and repair. Competitive Analysis Competitors: Honda CBR125R, Yamaha YZF-R125, Suzuki GSX-R125 (depending on region and specific model years within the range). Key Features Features: Focus on the potent Rotax two-stroke engine, advanced chassis design for its class, and race-inspired aesthetics. The manual's digital format ensures accessibility and easy navigation. 📋 Manual Details Coverage Areas Years Covered: 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 Page Count Estimated Pages: 300+ Manual Type Type: Digital Workshop Repair Manual Language Language: English Format Format: Digital (likely PDF) 📖 Manual Coverage Systems Covered Engine: Engine disassembly, assembly, tuning, lubrication, cooling system, carburetion, exhaust system Transmission: Gearbox inspection, repair, clutch assembly, operation Chassis: Frame, swingarm, suspension (front forks, rear shock), steering system Brakes: Front and rear brake systems (hydraulic calipers, master cylinders, lines, pads, rotors) Electrical: Wiring diagrams, ignition system, lighting, battery, charging system, starter, instruments Bodywork: Fairings, fuel tank, seat, body panels, mounting and removal procedures Procedures Included Maintenance: Routine checks, lubrication, filter replacement, chain adjustment, brake pad wear checks Troubleshooting: Diagnostic flowcharts, common problems and their solutions, electrical fault finding Repair: Component-specific repair instructions, gasket replacement, seal replacement, rebuilding procedures Rebuild: Complete engine rebuild, gearbox overhaul, suspension rebuild Technical Depth Depth: Comprehensive, from basic maintenance to full engine and gearbox rebuilds, including electrical system diagnostics. 📊 Manual Specifications File Format File Type: Digital (PDF recommended for compatibility and searchability) Print Quality Quality: High resolution for clear diagrams and text reproduction Binding Type Binding: Not applicable (Digital Format) Paper Type Paper: Not applicable (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, two-stroke, single-cylinder (Rotax 123/122) Displacement: 125cc Bore X Stroke: 54 mm x 54.5 mm Compression Ratio: 8.8:1 (pre-2000), 9.2:1 (post-2000, approximate) Induction: Reed valve induction, Dell'Orto PHBH 28 carburetors (typically) Ignition: Electronic CDI Performance Horsepower: Approx. 30-34 HP (depending on region and tuning, often restricted for learners) Torque: Approx. 18-20 Nm Fuel System Fuel Type: Unleaded gasoline (minimum 95 RON recommended for optimal performance and engine longevity) Fuel Delivery: Carburetor Oil Mixing: Automatic oil injection system (separate oil reservoir) 🔧 Transmission Standard Transmission Type: 6-speed constant mesh gearbox Clutch Type: Wet multi-plate clutch Features Gear Ratios: Specific ratios detailed within the manual for each gear. Final Drive: Chain drive 📐 Dimensions Exterior Length: Approx. 1970 mm Width: Approx. 700 mm Height: Approx. 1130 mm Wheelbase: Approx. 1360 mm Weights Dry Weight: Approx. 124 kg Fuel Tank Capacity: Approx. 12 Liters (including 2-liter reserve) 🛡️ Safety Features Ratings Safety Certification: CE compliant (for European markets) Active Features Brakes: Front: Single 320mm disc with 4-piston caliper; Rear: Single 220mm disc with 2-piston caliper. ABS was not a common feature on this model during this period. Lighting: Halogen headlamp, LED tail light (on later models) Passive Features Frame Type: Aluminum alloy twin-spar frame 💡 Technology Features Infotainment Infotainment System: Not applicable (focus is on mechanical and electrical systems of the motorcycle). Driver Assistance Assistance Systems: None typically fitted on models within this range, beyond standard braking systems. Connectivity Connectivity: Not applicable. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3000-5000 km or annually, depending on usage. Refer to manual for specific intervals. Spark Plug Replacement: Every 5000-8000 km, or as per manual recommendations based on plug type. Air Filter Cleaning: Every 2000-3000 km, or more frequently in dusty conditions. Chain Lubrication Adjustment: Every 500-1000 km, and adjust slack as needed. Fluid Specifications Engine Oil: 2-stroke specific premix oil (e.g., Motul 710 2T, Castrol TTS) for injection system. Refer to manual for specific Aprilia or Rotax recommendations. Coolant: Ethylene glycol-based coolant with corrosion inhibitors (50/50 mix with distilled water recommended). Brake Fluid: DOT 4 or DOT 5.1 (refer to manual for exact specification and replacement interval). Gearbox Oil: Specific gear oil for wet clutches, SAE 75W/80 or 10W/40 depending on manufacturer specification (check manual). Known Issues Carburetor Tuning: Sensitivity to altitude and temperature changes, requiring occasional recalibration. Power Valve Issues: The exhaust power valve can carbon up and seize, affecting engine performance. Requires regular cleaning. Cooling System: Potential for leaks from hoses or radiator if not maintained. Overheating can be an issue if cooling system is compromised. Electrical Connections: Corrosion on electrical connectors can lead to intermittent faults. Thorough inspection and cleaning recommended. 📚 Vehicle History Brand Heritage Heritage: Aprilia, an Italian manufacturer, has a strong racing pedigree, particularly in smaller displacement classes. The RS125 embodies this sporting heritage. Model Evolution Evolution: The RS125 evolved significantly throughout its lifespan. Key changes during the 1993-2002 period include updates to the Rotax...