🏷️ Basic Information Identification Make: Aprilia Model: RS 125 Year: 1993 Generation Generation Code: Rotax 122 Codes Chassis Code: AP02 👋 Introduction Market Position Market Segment: Lightweight sportbike, entry-level performance motorcycle Target Audience: Enthusiasts, DIY mechanics, owners seeking to maintain or restore their classic Aprilia RS 125. Competitive Analysis Key Competitors: Yamaha TZR 125, Honda NSR125R, Cagiva Mito 125, Suzuki RG125 Gamma. Key Features Design Philosophy: Race-inspired styling, lightweight chassis, potent two-stroke engine, advanced for its time. Unique Selling Points: Excellent handling, strong performance for a 125cc, distinctive Aprilia styling, and the legendary Rotax engine. 📋 Manual Details Coverage Areas Systems Covered: Engine, Fuel System, Ignition System, Cooling System, Exhaust System, Clutch, Transmission, Gearbox, Suspension (Front & Rear), Brakes (Front & Rear), Wheels, Tires, Electrical System, Chassis, Bodywork, Frame, Fairings, Instruments, Controls, Lubrication, Routine Maintenance, Troubleshooting, Diagnostics, Specifications, Torque Values, Wiring Diagrams, Special Tools. Page Count Estimated Page Count: 300+ Manual Type Manual Type: Full Service Repair Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Engine Overhaul: Complete engine disassembly, inspection, repair, and reassembly for the Rotax 122 engine. Fuel System Repair: Carburetor (Dell'Orto PHBH 28) tuning, jetting, cleaning, and repair; fuel pump and filter service. Ignition System Diagnostics: CDI ignition system troubleshooting, coil testing, spark plug analysis, and timing procedures. Cooling System Maintenance: Radiator service, coolant flush and fill, water pump inspection and seal replacement, thermostat testing. Transmission And Gearbox: Complete gearbox disassembly, inspection of gears and shift drum, clutch plate replacement, and lubrication specifications. Suspension And Steering: Front fork (Marzocchi 40mm) disassembly, seal replacement, oil level and type, rear shock absorber adjustment and overhaul, steering head bearing service. Brake System Overhaul: Front and rear brake caliper servicing, master cylinder rebuild, brake line inspection, bleeding procedures, and pad replacement. Electrical System Wiring: Comprehensive wiring diagrams for all circuits, lighting, instrumentation, and starter system. Chassis And Frame: Frame inspection, swingarm bearing service, and general chassis component checks. Bodywork And Fairings: Fairing removal and installation, decal placement, and general body panel maintenance. Procedures Included Routine Maintenance: Oil changes, filter replacements, chain adjustment, spark plug servicing, and pre-ride inspections. Troubleshooting Guide: Step-by-step diagnostic procedures for common problems and performance issues. Engine Rebuild Instructions: Detailed instructions for cylinder head removal, piston and ring replacement, crankshaft inspection, and bearing installation. Carburetor Tuning: Guidance on adjusting idle speed, mixture, and jetting for optimal performance and emissions. Suspension Setup: Instructions for adjusting damping, preload, and oil levels for various riding conditions. Brake Bleeding: Proper procedures for bleeding air from the hydraulic brake system. Electrical Troubleshooting: Diagnosing and repairing issues with lights, horn, starter, and charging system. Technical Depth Depth Of Coverage: Comprehensive, covering everything from basic maintenance to complete engine and chassis rebuilds. Includes detailed technical specifications and troubleshooting. 📊 Manual Specifications File Format File Type: PDF Searchability: Searchable text Printability: Printable Print Quality Image Resolution: High-resolution images and diagrams Binding Type Binding: N/A (Digital PDF) Paper Type Paper Quality: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, two-stroke, single-cylinder Engine Displacement: 124.8 cc Bore X Stroke: 54 mm x 54.5 mm Compression Ratio: 12.5:1 Engine Manufacturer: Rotax Engine Variant: Rotax 122 E Power Valve System: APCS (Aprilia Power Combustion System) Performance Horsepower: Approx. 30-34 HP (depending on market regulations) Torque: Approx. 20-22 Nm Fuel System Carburetor Model: Dell'Orto PHBH 28 QD Fuel Delivery: Pre-mix lubrication (automatic oil injection) Fuel Type: Unleaded gasoline, minimum 95 RON Fuel Tank Capacity: 7.4 Liters (1.95 US gal) 🔧 Transmission Standard Transmission Type: 6-speed constant mesh Gear Ratios: 1st: 2.500 (30/12), 2nd: 1.813 (29/16), 3rd: 1.400 (28/20), 4th: 1.130 (26/23), 5th: 0.960 (24/25), 6th: 0.852 (25/29) Final Drive: Chain Clutch Type: Wet, multi-plate Features Clutch Actuation: Hydraulic 📐 Dimensions Exterior Length: 1940 mm (76.4 in) Width: 705 mm (27.8 in) Height: 1070 mm (42.1 in) Wheelbase: 1350 mm (53.1 in) Seat Height: 810 mm (31.9 in) Weights Dry Weight: 131 kg (289 lbs) Gross Vehicle Weight Rating: Not specified, estimated ~280 kg 🛡️ Safety Features Ratings Safety Ratings: N/A (Motorcycle, no standardized crash ratings like cars) Active Features Brakes: Hydraulic disc brakes front and rear. Lighting: Halogen headlight, LED tail light. Passive Features Frame Construction: Perimeter frame, aluminum alloy construction. Handlebar Design: Clip-on handlebars for sporty riding position. 💡 Technology Features Infotainment Instrument Cluster: Analog tachometer, speedometer, odometer, trip meter, coolant temperature gauge, and indicator lights. Driver Assistance ABS: Not equipped with ABS. Connectivity Connectivity Features: N/A (Basic motorcycle technology of its era) 🔧 Maintenance Service Intervals Oil Change Interval: Every 5,000 km or annually. Check level more frequently. Spark Plug Replacement: Every 10,000 km or as per manual recommendations. Air Filter Cleaning: Every 5,000 km, clean and re-oil as needed. Chain Lubrication Adjustment: Every 1,000 km or after washing/wet riding. Coolant Flush: Every 2 years. Fluid Specifications Engine Oil Type: 2-stroke...