🏷️ Basic Information Identification Make: Aprilia Model: RS 125 Year: 2004 Codes Chassis Code Range: ZAPM45XX (specific to 2004 model year, check manual for exact VIN decoding) 👋 Introduction Market Position Segment: Lightweight sportbike, popular for new riders and track day enthusiasts due to its performance and handling. Competitive Analysis Competitors: Yamaha YZF-R125, Honda CBR125R, Kawasaki Ninja 125 (though model availability varied by region and year). Key Features Design Philosophy: Aggressive styling mimicking larger Aprilia sportbikes, focused on rider engagement and agility. Engine Type: Two-stroke, single-cylinder, liquid-cooled, known for its punchy power delivery. Handling: Renowned for its sharp handling and excellent chassis, a hallmark of Aprilia's sportbike heritage. 📋 Manual Details Coverage Areas Documentation Type: Service and Repair Manual Manual Language: English Format: Downloadable Digital File (likely PDF) Page Count Estimated Page Count: Likely 300-500 pages (typical for comprehensive motorcycle service manuals of this era) 📖 Manual Coverage Systems Covered Engine Mechanical: Full engine overhaul, component replacement, tuning, lubrication system, cooling system. Fuel System: Carburetor disassembly, cleaning, adjustment, fuel lines, fuel pump (if applicable). Ignition System: CDI unit, spark plugs, ignition coils, wiring diagrams for ignition. Transmission: Gearbox disassembly, clutch operation, gear linkage, shift drum, final drive. Cooling System: Radiator, coolant hoses, water pump, thermostat, coolant specifications. Exhaust System: Exhaust pipe removal, mufflers, mounting hardware. Brakes: Front and rear brake systems, caliper overhaul, master cylinder, brake fluid specifications, bleeding procedures. Suspension Front: Front fork disassembly, oil change, seal replacement, spring specifications, damping adjustments. Suspension Rear: Monoshock absorber adjustment, linkage system maintenance, rear swingarm. Electrical System: Wiring diagrams, battery maintenance, lighting, starter motor, charging system (alternator/stator). Frame And Bodywork: Fairing removal and installation, frame inspection, fuel tank, seat, handlebars, footpegs. Wheels And Tires: Wheel bearing replacement, tire changing, tire pressure recommendations. Procedures Included Routine Maintenance: Oil changes, filter replacements, chain adjustment, spark plug inspection/replacement, brake fluid changes. Troubleshooting: Diagnosing common mechanical and electrical faults, fault code identification (if applicable). Engine Overhaul: Top-end rebuild (cylinder, piston, rings), bottom-end inspection, crankshaft and connecting rod service. Carburetor Tuning: Jetting specifications, idle speed adjustment, mixture control. Brake System Service: Pad replacement, caliper rebuilding, fluid flushing and replacement. Suspension Servicing: Fork oil replacement, seal installation, shock absorber servicing. Electrical Diagnostics: Using wiring diagrams to trace faults, testing components like stator, regulator, starter. Frame And Body Repair: Fairing repair, panel alignment, mounting procedures. Technical Depth Depth Of Coverage: Comprehensive. Covers everything from basic maintenance to full engine and gearbox rebuilds. Includes detailed diagnostic procedures and torque specifications. 📊 Manual Specifications File Format File Type: PDF (Portable Document Format) Searchability: Likely text-searchable for quick information retrieval. Print Quality Print Readability: Designed for clear viewing on screen and printable for workshop use. Graphics and diagrams should be high resolution. Binding Type Binding: N/A (Digital format) Paper Type Paper Quality: N/A (Digital format) ⚙️ Engine Specifications Primary Engine Engine Type: 2-stroke, single-cylinder, liquid-cooled, reed valve induction Bore X Stroke: 54 mm x 54.5 mm Displacement: 124.8 cc (125cc class) Compression Ratio: Approx. 7.2:1 (varies slightly by market/tune) Valvetrain: Reed valve induction, exhaust power valve system (APTS - Aprilia Performance Tuning System). Performance Horsepower Est: Approx. 30-34 HP (depending on market restrictions and tuning, often limited to 15 HP in learner-legal configurations) Torque Est: Approx. 23-25 Nm Fuel System Carburetor: Dell'Orto PHBH 28 (or similar 28mm carb), often with APEX power jet system. Fuel Type: Unleaded gasoline, octane rating 95 (RON) or higher recommended. Fuel Mixture: Automatic oil injection system for 2-stroke oil. Lubrication Oil Type: High-quality 2-stroke synthetic or semi-synthetic oil (refer to manual for specific API TC recommendations). 🔧 Transmission Standard Type: 6-speed constant mesh, sequential manual gearbox. Clutch: Wet multi-plate clutch, hydraulically operated. Gear Ratios: Specific ratios detailed in manual; typically close-ratio for sporty performance. Final Drive: Chain drive, with specific sprocket ratios detailed in manual. 📐 Dimensions Exterior Length: Approx. 1950 mm Width: Approx. 710 mm (at handlebars) Height: Approx. 1060 mm (at handlebars) Wheelbase: Approx. 1375 mm Weights Dry Weight: Approx. 131 kg Curb Weight Est: Approx. 139 kg (with all fluids) Max Load Capacity: Refer to manual; typically around 180-200 kg (rider + passenger + luggage). Cargo Cargo Capacity: Minimal, designed for single rider, small under-seat storage may exist. 🛡️ Safety Features Ratings Safety Ratings: N/A (Motorcycles typically do not receive official NCAP-style crash ratings.) Active Features Braking System: Hydraulic disc brakes front and rear. Often with larger diameter front disc for enhanced stopping power. Tires: Sport-oriented radial tires for grip. Recommended pressures listed in manual. Passive Features Lighting: Halogen headlight, taillight, turn signals. Frame Construction: Aluminum alloy twin-spar frame for rigidity and light weight. 💡 Technology Features Infotainment Dashboard: Analog tachometer, speedometer, odometer, trip meter, coolant temperature gauge, turn signal indicators, neutral indicator. Driver Assistance Power Delivery System: Aprilia Performance Tuning System (APTS) - electronically controlled exhaust power valve for improved torque at low...