🏷️ Basic Information Identification Make: Aprilia Model: RS 125 Model Variant: Street/Sportbike Codes Vin Code Start: ZA0 Vin Code End: ZA0 👋 Introduction Market Position Segment: Lightweight sportbike, entry-level performance motorcycle. Target Audience: Enthusiasts, track day riders, young motorcyclists seeking performance and style. Competitive Analysis Competitors: Yamaha YZF-R125, Honda CBR125R, Suzuki GSX-R125 (later models). Key Features Design Philosophy: Race-inspired styling, agile handling, potent two-stroke performance. Engine Type: Liquid-cooled, single-cylinder, two-stroke with Rotax 125cc power unit. Chassis Features: Aluminum alloy perimeter frame, upside-down front forks, racing-derived suspension components. 📋 Manual Details Coverage Areas Model Years Covered: 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 Page Count Estimated Pages: 350+ Manual Type Type: Service and Repair Manual Language Language: English Format Format: Digital Download (PDF) 📖 Manual Coverage Systems Covered Engine: Complete engine overhaul, top end, bottom end, cooling system, lubrication system. Fuel System: Carburetor (Dell'Orto PHBH 28), fuel pump, fuel lines, tank. Ignition System: CDI ignition, spark plug, stator, rotor. Transmission: 6-speed gearbox, clutch operation, gearbox disassembly and reassembly. Chassis Suspension: Front fork (upside-down R.S.V. type), rear monoshock absorber (Rotax/Sachs), swingarm. Brakes: Front and rear disc brakes (Brembo), brake caliper service, master cylinder, hydraulic lines. Electrical System: Wiring diagrams, battery, lighting, starter motor, instrumentation. Bodywork: Fairing removal and installation, seat, tank, plastics. Procedures Included Maintenance: Regular servicing, oil changes, filter replacements, chain adjustment, brake bleeding. Troubleshooting: Diagnostic procedures for common faults, error code interpretation (if applicable). Repair: Step-by-step instructions for component repair and replacement. Rebuild: Complete engine and gearbox rebuild procedures. Adjustments: Carburetor jetting, valve clearance (if applicable to 2-stroke variants), clutch and brake lever adjustments. Technical Depth Depth: Comprehensive, covering routine maintenance to complete engine and chassis overhauls. 📊 Manual Specifications File Format Format Details: PDF, searchable text, high-resolution images, printable pages. Print Quality Quality: N/A (Digital Download) Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, single-cylinder, two-stroke Displacement: 124.8 cc (7.62 cu in) Bore X Stroke: 54 mm x 54.5 mm Compression Ratio: Approx. 8.9:1 Power Output: 15 hp (11.2 kW) @ 9,000 rpm (restriced for A1 license), often quoted higher for unrestricted versions (~30-33 hp). Torque: Approx. 11 Nm (8.1 lb-ft) @ 7,500 rpm (restricted), higher for unrestricted. Cooling System: Liquid-cooled with fan Valve Mechanism: Reed valve intake, exhaust power valve (ATAC - Automatic Torque Amplification Chamber). Fuel System Carburetor: Dell'Orto PHBH 28 BD/BS Fuel Type: Unleaded gasoline (RON 95 or higher recommended) Fuel Tank Capacity: 7.2 Liters (1.9 US gal) - early models, later up to 13 Liters. Lubrication Oil System: Autolube (automatic oil injection) 2-Stroke Oil Type: High-quality synthetic 2-stroke motorcycle oil (e.g., Castrol TTS, Motul 710). 🔧 Transmission Standard Type: 6-speed constant mesh Clutch: Wet multi-plate, cable-actuated Features Gear Ratios: Refer to manual for specific ratios per model year. Final Drive: Chain drive 📐 Dimensions Exterior Length: Approx. 1940 mm (76.4 in) (varies slightly by year) Width: Approx. 730 mm (28.7 in) (varies slightly by year) Height: Approx. 1060 mm (41.7 in) (varies slightly by year) Wheelbase: Approx. 1375 mm (54.1 in) Weights Dry Weight: Approx. 131 kg (288.8 lbs) (varies by year and specifications) Wet Weight: Approx. 145 kg (319.7 lbs) 🛡️ Safety Features Ratings Safety Certification: N/A (Motorcycle specific safety features apply) Active Features Braking System: Hydraulic disc brakes front and rear. Front typically dual piston Brembo caliper. Suspension Geometry: Designed for agile and stable handling during cornering. Passive Features Frame Construction: Aluminum alloy perimeter frame for rigidity and crash protection. Lighting: Halogen headlights, taillight, and turn signals for visibility. 💡 Technology Features Infotainment Instrumentation: Analog speedometer, tachometer, odometer, trip meter, coolant temperature gauge, indicator lights. Driver Assistance ABS: Not available on models covered by this manual. Connectivity Charging System: Alternator (stator and rotor) with CDI ignition system. 🔧 Maintenance Service Intervals Oil Change 2 Stroke: Autolube tank needs regular topping up with 2-stroke oil. Check level frequently. Spark Plug Replacement: Recommended every 5,000-10,000 km or as per manual, depending on usage. Air Filter Cleaning: Inspect and clean/replace every 5,000 km or as needed, especially in dusty conditions. Chain Maintenance: Lubricate and adjust chain every 1,000 km or more frequently under wet/dirty conditions. Brake Fluid Flush: Recommended every 2 years. Fluid Specifications Coolant: Ethylene glycol based coolant, 50/50 mix with distilled water. Capacity approx. 0.8 Liters. Gearbox Oil: SAE 80W/90 API GL-4 or GL-5 transmission oil. Capacity approx. 0.75 Liters. Fork Oil: SAE 5W or 7.5W fork oil. Specific type and quantity per fork leg detailed in manual. Known Issues Power Valve: Carbon buildup can cause sticking, leading to poor performance or seizure. Regular cleaning is vital. Carburetor: Dell'Orto carbs can be sensitive to fuel quality and require precise jetting and cleaning. Engine Seizure: Can occur due to lean fuel mixture, overheating, incorrect oil/fuel ratio,...