🏷️ Basic Information Identification Make: Aprilia Model: RS 125 Model Code: Rotax 122/123 variants Body Style: Sportbike / Faired Motorcycle Generation Generation Name: First Generation (Rotax Engine Era) Codes Engine Code Family: Rotax 122/123 👋 Introduction Market Position Segment: Lightweight sportbike, entry-level performance motorcycle Target Audience: Beginner riders, commuters, track day enthusiasts seeking affordable performance Competitive Analysis Key Competitors: Yamaha YZF-R125 (later models), Cagiva Mito 125, Honda CBR125R (later models), Suzuki GSX-R125 (later models) Key Features Performance Focus: Highly regarded for its sharp handling and spirited two-stroke performance Design Inspiration: Closely styled after Aprilia's larger V-twin sportbikes of the era Engine Type: Characterized by its powerful Rotax two-stroke single-cylinder engine with reed valve induction and often a power valve (APTS - Aprilia Performance Power Valve System) 📋 Manual Details Coverage Areas Manual Coverage Years: 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 Page Count Estimated Page Count: 300-500 (typical for comprehensive workshop manuals) Manual Type Manual Type: Workshop Service Repair Manual Language Language: English (typically, for international distribution) Format Digital Format: PDF 📖 Manual Coverage Systems Covered Engine System: Complete engine assembly, disassembly, inspection, and overhaul (cylinder, piston, crankshaft, bearings, seals, lubrication, cooling) Fuel System: Carburetor (Dell'Orto PHBH/VHSH variants) tuning, jetting, cleaning, and rebuild; fuel tank, fuel lines, fuel pump (if applicable) Ignition System: CDI ignition, spark plug, ignition coil, wiring diagrams, timing adjustment Exhaust System: Expansion chamber, silencer, gaskets, and mounting Transmission System: 6-speed gearbox, clutch (wet multi-plate), gear shifting mechanism, lubrication, and adjustment Cooling System: Liquid cooling, radiator, water pump, hoses, thermostat, coolant specifications Chassis Frame: Frame inspection, alignment, welding repairs (advanced), steering head bearings Suspension Front: Telescopic fork (Marzocchi, Paioli), oil levels, seal replacement, spring rates, damping adjustments Suspension Rear: Monoshock (Progressive), linkage system, shock absorber overhaul and adjustment Brakes Front: Hydraulic disc brakes, caliper maintenance, brake pad replacement, master cylinder, brake fluid specifications, bleeding procedures Brakes Rear: Hydraulic disc brakes, caliper maintenance, brake pad replacement, master cylinder, brake fluid specifications, bleeding procedures Wheels Tires: Wheel bearing inspection and replacement, tire pressure, tire size recommendations, rim specifications Electrical System: Battery, charging system (alternator/stator), starter motor, lighting (headlight, taillight, indicators), horn, wiring diagrams, fuse identification Bodywork Fairings: Fairing removal and installation, plastics repair (minor), decal placement Controls: Throttle, clutch lever, brake lever, gear shift lever, and cable adjustments Procedures Included Routine Maintenance: Oil changes, filter replacements, chain adjustment, spark plug checks, brake fluid flushes, coolant checks, tire pressure checks Troubleshooting Diagnostics: Step-by-step guides for diagnosing common performance issues, starting problems, electrical faults, and mechanical noises Engine Rebuild: Detailed instructions for full engine disassembly, cleaning, inspection of wear limits, part replacement, and reassembly Suspension Overhaul: Fork seal replacement, damper rod maintenance, rear shock service Brake System Maintenance: Pad replacement, fluid bleeding, caliper service Carburetor Tuning: Jetting changes for different altitudes/conditions, idle speed adjustment, mixture screw settings Electrical Troubleshooting: Using wiring diagrams to diagnose circuit faults, testing components Clutch Adjustment And Replacement: Cable adjustment, clutch plate replacement Gearbox Maintenance: Inspection of gear teeth, shift forks, and drum Torque Specifications: Essential torque values for all critical fasteners Technical Depth Depth Level: Comprehensive (covers everything from basic maintenance to full engine and chassis rebuilds) Diagnostic Procedures: Detailed troubleshooting flowcharts and diagnostic sequences Dimensional Data: Precise measurements and tolerances for critical engine and chassis components Wiring Diagrams: Complete and detailed electrical system schematics 📊 Manual Specifications File Format File Type: PDF Searchability: Searchable text content for efficient information retrieval Printability: Printable pages allowing for physical reference Print Quality Image Resolution: High-resolution images, diagrams, and illustrations Binding Type Binding: N/A (Digital PDF format) Paper Type Paper Type: N/A (Digital PDF format) ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, two-stroke, single-cylinder, reed valve induction Displacement: 124.8 cc Bore X Stroke: 54 mm x 54.5 mm (typical for Rotax 122/123) Compression Ratio: Approx. 11.5:1 to 12.5:1 (variant dependent) Power Valve System: APTS (Aprilia Performance Power Valve System) or similar, enhances low-to-mid range torque and high-end power Performance Horsepower Peak: Approx. 30-35 HP (15 kW regulated for A1 license, unrestricted ~30-34 HP) Torque Peak: Approx. 20-23 Nm Fuel System Carburetor Type: Dell'Orto PHBH 28 or VHSH 30 (model dependent) Fuel Delivery: Gravity feed from fuel tank Fuel Type Required: Unleaded gasoline (minimum 95 RON), 2-stroke oil injection or premix (manual specifies) Lubrication Oil System: Automatic oil injection system (separate oil reservoir) or premix 🔧 Transmission Standard Transmission Type: 6-speed constant mesh, sequential gearbox Clutch Type: Wet, multi-plate Features Gear Ratios: Specific ratios provided in manual for each gear Final Drive: Chain drive Transmission Oil Type: API GL-4, SAE 75W/90 or 80W/90 transmission oil (specified in manual) 📐 Dimensions Exterior Length: Approx. 1990 mm Width: Approx. 720 mm Height: Approx. 1130 mm Wheelbase: Approx. 1370 mm Weights Dry Weight: Approx. 131 kg Fuel Tank Capacity: Approx. 13 Liters Oil Tank Capacity: Approx. 1.5 Liters 🛡️...