🏷️ Basic Information Identification Make: Aprilia Model: RS 125 Year: 1999 Codes Chassis Code: AP06 👋 Introduction Market Position Segment: Entry-level to mid-range sportbike for young riders and enthusiasts Purpose: Designed for sporty riding, track days, and general road use Competitive Analysis Competitors: Yamaha YZF-R125, Suzuki GSX-R125, Kawasaki Ninja 125, Honda CBR125R Key Features Design: Aggressive sportbike styling, aerodynamic fairings, aggressive riding posture Performance: Lightweight chassis, agile handling, responsive two-stroke engine Manual Value: Essential resource for maintaining peak performance and longevity of the RS 125. 📋 Manual Details Coverage Areas Engine: Complete Engine Rebuild, Tuning, Diagnostics, Component Overhaul Transmission: Clutch Assembly, Gearbox Internals, Shift Mechanism, Lubrication Chassis Suspension: Front Forks (USD), Rear Monoshock Suspension, Swingarm, Bearings Brakes: Front Disc Brakes (Rotors, Calipers, Master Cylinder), Rear Disc Brake, Fluid Lines, Bleeding Procedures Electrical System: Ignition System, Lighting, Charging System, Starter Motor, Wiring Diagrams, ECU Diagnosis Bodywork Fairings: Fairing Removal and Installation, Seat, Tank, Body Panel Repair Fuel System: Carburetor (Dell'Orto PHBH 28), Fuel Tank, Fuel Lines, Petcock Cooling System: Radiator, Coolant Hoses, Water Pump, Thermostat Exhaust System: Expansion Chamber, Silencer, Gasket Replacement Wheels Tires: Wheel Bearing Replacement, Tire Mounting and Balancing, Rim Specifications Maintenance Schedule: Recommended Service Intervals for Oil Changes, Spark Plugs, Chain Adjustment, etc. Troubleshooting: Diagnostic Charts for Common Issues, Symptom-Based Troubleshooting Torque Specifications: Detailed Torque Values for all Fasteners Page Count Number Of Pages: Estimated 300-400 Pages (typical for a comprehensive manual) Manual Type Type: Full Service & Repair Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered All Systems: Engine, Transmission, Clutch, Cooling System, Fuel System, Ignition System, Electrical System, Chassis, Suspension, Brakes, Wheels, Tires, Bodywork, Fairings, Lubrication System Procedures Included Maintenance: Routine Maintenance, Oil Changes, Filter Replacement, Spark Plug Service, Chain and Sprocket Inspection/Replacement, Coolant Flush, Brake Bleeding Repair: Engine Rebuilding (Top-End and Bottom-End), Transmission Overhaul, Clutch Replacement, Suspension Component Repair, Brake System Overhaul, Electrical Component Diagnosis and Repair, Carburetor Rebuilding, Radiator Repair/Replacement Troubleshooting: Systematic Diagnosis of Mechanical and Electrical Faults, Common Problems and Solutions Technical Specifications: Engine Specifications, Torque Values, Fluid Capacities, Recommended Lubricants, Electrical Component Values, Dimensions Wiring Diagrams: Comprehensive Electrical Schematics for All Circuits Technical Depth Depth: Detailed step-by-step instructions with diagrams and illustrations covering everything from basic maintenance to complete engine and gearbox rebuilds. Suitable for both novice and experienced mechanics. 📊 Manual Specifications File Format Format: PDF (Portable Document Format) Searchable: Yes, text-searchable content for quick information retrieval Printable: Yes, allows for printing of individual pages or the entire document Print Quality Quality: High-resolution scans and clear diagrams ensure legibility. Binding Type Binding: N/A (Digital Format) Paper Type Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Type: Single-cylinder, two-stroke, liquid-cooled Displacement: 124.8 cc (7.6 cu in) Bore X Stroke: 54 mm x 54.5 mm Compression Ratio: 8.8:1 (typical for the era, may vary slightly) Valvetrain: Rotary Disc Valve intake Ignition: Electronic ignition with CDI (Capacitor Discharge Ignition) Lubrication: Automatic pre-mix oil injection (separate oil tank) Performance Horsepower: Approx. 30-34 HP (depending on market restrictions and tuning) Torque: Approx. 2.3 kg-m (22.5 Nm) at 9,000 RPM Fuel System Carburetor: Dell'Orto PHBH 28 AS (manual will detail jetting and adjustments) Fuel Type: Unleaded gasoline (minimum 95 octane recommended) Cooling System Type: Liquid-cooled Coolant Type: Ethylene glycol-based antifreeze/coolant (e.g., Motul Inugel Expert Ultra, Shell Helix Ultra Coolant) 🔧 Transmission Standard Type: 6-speed constant mesh, sequential gearbox Clutch: Wet, multi-plate clutch, cable operated Features Gear Ratios: Specific ratios detailed in the manual for each gear. Final Drive: Chain drive (520 pitch typical) Transmission Fluid Type: High-quality 2-stroke engine oil for automatic injection system (e.g., Motul 710 2T, Castrol Power 1 2T) 📐 Dimensions Exterior Length: Approx. 1990 mm (78.3 in) Width: Approx. 710 mm (28.0 in) Height: Approx. 1060 mm (41.7 in) Wheelbase: Approx. 1340 mm (52.8 in) Seat Height: Approx. 810 mm (31.9 in) Weights Dry Weight: Approx. 132 kg (291 lbs) Fuel Tank Capacity: Approx. 10.5 liters (2.8 US gal) Oil Tank Capacity: Approx. 1.5 liters (0.4 US gal) 🛡️ Safety Features Ratings Crash Test Results: N/A (Motorcycle safety ratings are typically not standardized like cars) Active Features Braking: Dual disc front brake, single disc rear brake for effective stopping power Suspension: Inverted front forks and adjustable rear monoshock provide stable handling and control Passive Features Lighting: Halogen headlamp, LED tail light, and turn signals for visibility Ergonomics: Sporty yet manageable riding position contributing to rider control 💡 Technology Features Infotainment Dashboard: Analog tachometer, speedometer, odometer, trip meter, coolant temperature gauge, and warning lights. Driver Assistance N A: None (typical for sportbikes of this era) 🔧 Maintenance Service Intervals Oil Change: Every 3,000-5,000 km or annually (for gearbox oil). Check owner's manual for precise interval. Spark Plug: Every 5,000-7,000 km (recommend NGK BR9EG or equivalent as per manual) Air Filter: Inspect every 3,000 km, clean or replace as...