🏷️ Basic Information Identification Make: Aprilia Model: RS 125 Model Years Covered: 2002 onwards Codes Engine Code: Rotax 122 (typically) Generation Generation Identifier: Post-2002 facelift/update models 👋 Introduction Market Position Segment: Lightweight sportbike, A1 license category (in many European markets). Target Audience: Young riders, commuting, track day enthusiasts. Competitive Analysis Key Competitors: Yamaha YZF-R125 (later models), Cagiva Mito 125, Honda CBR125R. Key Features Design Philosophy: Aggressive styling mimicking larger Aprilia sportbikes, high-performance 2-stroke engine. Handling Characteristics: Renowned for sharp handling and agile chassis due to quality suspension and frame. 📋 Manual Details Coverage Areas Manual Type: Workshop Service Repair Manual, Parts Catalog, Owner's Manual Language: English (assumed, common for workshop manuals of this era and brand) Format: Digital (PDF expected, though physical versions may exist) Page Count Estimated Page Count: 300-500 pages (typical for comprehensive workshop manuals) 📖 Manual Coverage Systems Covered Engine Overhaul: Complete disassembly, inspection, repair, and reassembly of the 125cc 2-stroke engine. Cooling System: Radiator, hoses, water pump, thermostat maintenance and repair. Fuel System: Carburetor (likely Dell'Orto VHSB or similar), fuel pump, fuel lines, and tank service. Ignition System: CDI unit, spark plug, ignition coil, stator, and wiring diagnostics. Exhaust System: Expansion chamber, silencer, and pipe maintenance. Transmission: Gearbox (6-speed), clutch (wet multi-plate), chain and sprockets. Chassis And Frame: Frame inspection, swingarm, linkage, and rear shock absorber. Front Suspension: Upside-down fork (Marzocchi or similar), seals, oil levels, and adjustment procedures. Braking System: Front and rear disc brakes, hydraulic system, caliper service, pad replacement, fluid bleeding. Electrical System: Battery, lighting, horn, starter motor, wiring diagrams, component testing. Wheels And Tires: Rim inspection, bearing replacement, tire mounting and balancing. Bodywork And Fairings: Fairing removal, installation, and minor repair. Procedures Included Routine Maintenance: Oil changes, filter replacements, chain adjustments, spark plug checks. Troubleshooting: Diagnostic flowcharts and symptom-based problem-solving for common issues. Engine Rebuild: Piston, ring, cylinder, crankshaft, and bearing replacement instructions. Carburetor Tuning: Jetting, float height, idle speed adjustments for optimal performance. Suspension Setup: Fork oil level and viscosity, spring pre-load adjustments. Brake Overhaul: Master cylinder rebuilding, caliper seal replacement, line flushing. Electrical Diagnostics: Wiring diagram interpretation, multimeter usage for fault finding. Technical Depth Diagnostic Capabilities: Advanced diagnostics for engine performance, electrical faults, and chassis issues. Repair Scope: Covers everything from basic user servicing to full engine and gearbox rebuilds. Special Tools: Identifies and describes any Aprilia-specific or specialized tools required for certain procedures. 📊 Manual Specifications File Format Digital Format: PDF (Portable Document Format) Searchability: Likely fully searchable text for quick information retrieval. Print Quality Graphic Resolution: High-resolution diagrams and images for clarity. Binding Type Digital Binding: N/A (Digital format) Paper Type Digital Paper Type: N/A (Digital format) ⚙️ Engine Specifications Primary Engine Configuration: Single-cylinder, 2-stroke, liquid-cooled Displacement: 124.8 cc (125cc class) Bore X Stroke: 54 mm x 54.5 mm (typical for Rotax 122) Power Output Hp: Approximately 30-34 HP (often restricted in some markets for A1 license compliance). Torque Nm: Approximately 20-22 Nm (unrestricted). Performance Redline Rpm: Around 10,000-11,000 RPM. Induction System: Reed valve induction with a carburetor. Fuel System Carburetor Type: Dell'Orto VHSB 34 (or similar 34mm diaphragm carb). Fuel Type: Unleaded gasoline (RON 95 or higher recommended). Oil Mixing: Automatic oil injection system (separate oil reservoir). 🔧 Transmission Standard Gearbox Type: Constant mesh, 6-speed manual transmission. Clutch Type: Wet, multi-plate diaphragm spring clutch. Features Final Drive: O-ring sealed chain drive. Gear Ratios: Specific ratios are detailed in the manual, but designed for sporty performance. Optional Gearbox Options: N/A (Single gearbox configuration for this model). 📐 Dimensions Exterior Length: Approx. 1950 mm Width: Approx. 740 mm (at handlebars) Height: Approx. 1070 mm (at handlebars) Seat Height: Approx. 810 mm Weights Dry Weight: Approx. 130-135 kg Fuel Tank Capacity: Approx. 13 Liters Oil Tank Capacity: Approx. 1.2 Liters Coolant Capacity: Approx. 0.7 Liters 🛡️ Safety Features Ratings Safety Certification: European type-approval standards (e.g., Euro 2 for emissions in later models). Active Features Braking System Type: Hydraulic disc brakes front and rear. Front Brake Disc Size: 320 mm (typical for higher-spec versions), single disc with radial caliper. Rear Brake Disc Size: 220 mm, single disc with single-piston caliper. Tire Specifications: Front: 110/70-17, Rear: 150/60-17 (common sizes). Passive Features Lighting: Halogen headlamp, LED tail light (depending on specific sub-model/update). Instrumentation: Analog tachometer, digital speedometer, essential warning lights. 💡 Technology Features Infotainment Infotainment System: N/A (Basic analog/digital instrumentation, no infotainment system). Driver Assistance ABS: ABS was not standard on most 2002+ RS125 models, though it may have been an option on later iterations or specific market versions. Check manual for availability. Connectivity Connectivity Features: N/A (No Bluetooth, smartphone integration, etc.). 🔧 Maintenance Service Intervals Oil Change Interval: Refer to manual: typically every 5,000-7,000 km or annually. Spark Plug Replacement: Refer to manual: typically every 5,000-10,000 km. Air Filter Cleaning: Refer to manual: frequent checks and cleaning recommended, especially in dusty conditions....