🏷️ Basic Information Identification Make: Aprilia Model: RS125 Year: 1998 Market Segment: Sportbike / Supersport Generation Generation Identifier: First Generation (Rotax 123/122 based) Codes Vin Code Prefix: ZDA 👋 Introduction Market Position Market Position: The Aprilia RS125 (1998) occupied a significant niche in the lightweight supersport market, offering a premium Italian alternative to Japanese 125cc sportbikes. It was renowned for its race-inspired styling, sophisticated chassis, and potent two-stroke engine, appealing to younger riders and those seeking a high-performance, agile machine. Competitive Analysis Competitive Analysis: Competed directly with models like the Yamaha YZF-R125 (though later generation), Honda CBR125R, and Suzuki GSX-R125. The RS125 often distinguished itself with superior build quality, advanced suspension components (like upside-down forks), and a more aggressive performance envelope. Key Features Key Features: Race-derived chassis, aggressive styling, potent Rotax two-stroke engine, adjustable suspension, powerful braking system, excellent handling dynamics. 📋 Manual Details Coverage Areas Coverage Areas: All Models, Engines, Trims, Transmissions (where applicable for 1998 RS125) Page Count Page Count: Estimated 300-500 pages (typical for comprehensive workshop manuals) Manual Type Manual Type: Workshop Repair Service Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Systems Covered: Engine (Top-end, Bottom-end, Cooling, Lubrication), Fuel System (Carburetion, Fuel Tank, Lines), Ignition System, Exhaust System, Transmission (Clutch, Gearbox, Final Drive), Chassis, Suspension (Front Forks, Rear Shock Absorber), Braking System (Front/Rear Brakes, Hydraulic Lines), Electrical System (Wiring Harness, Lighting, Battery, Charging System), Bodywork, Frame, Wheels, Tires, Instruments and Controls, Troubleshooting, Diagnostics. Procedures Included Procedures Included: Routine Maintenance, Inspections, Adjustments, Troubleshooting Guides, Component Removal and Installation, Engine Rebuild Procedures, Carburetor Tuning and Rebuild, Suspension Overhaul, Brake Bleeding and Component Replacement, Electrical System Diagnostics, Torque Specifications, Special Tool Recommendations, Wiring Diagrams, Exploded Views. Technical Depth Technical Depth: Comprehensive: Covers basic maintenance to complete engine and chassis overhauls, detailed diagnostics, and repair procedures for all major components. Suitable for both experienced mechanics and dedicated enthusiasts. 📊 Manual Specifications File Format File Format: PDF (Portable Document Format) Print Quality Print Quality: High Resolution, Sharply rendered text and diagrams, suitable for printing Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, 2-stroke, single-cylinder Engine Displacement: 124.8 cc (cc) Bore X Stroke: 54 mm x 54.5 mm Compression Ratio: 8.4:1 (typical, may vary slightly) Valve Train: Reed valve induction, Rotax Electronic Power Valve (DEP) Ignition System: Electronic ignition (CDI), dual spark plugs Lubrication: Pre-mix or separate oil injection system (depending on specific model variant and market) Performance Horsepower: Approx. 30-34 HP @ 11,000 RPM (in unrestricted European/ATCC specification; restricted for licensing laws) Torque: Approx. 1.8 kg-m (17.6 Nm) @ 10,500 RPM Fuel System Fuel Delivery: Carburetor Carburetor Model: Dell'Orto PHBH 28 RD (common fitment, may vary) Fuel Type: Unleaded gasoline (95 RON or higher recommended) 🔧 Transmission Standard Transmission Type: 6-speed manual Clutch Type: Wet multi-plate Final Drive: Chain drive 📐 Dimensions Exterior Length: Approx. 1950 mm (76.8 in) Width: Approx. 740 mm (29.1 in) Height: Approx. 1120 mm (44.1 in) Wheelbase: Approx. 1345 mm (53.0 in) Seat Height: Approx. 805 mm (31.7 in) Weights Dry Weight: Approx. 131 kg (288.8 lbs) Wet Weight: Approx. 145 kg (320 lbs) Fuel Tank Capacity: 15 Liters (3.96 US gal) 🛡️ Safety Features Ratings Safety Ratings: N/A (Motorcycles are not subject to automotive crash test ratings like NHTSA or Euro NCAP) Active Features Active Features: Powerful Braking System (e.g., 320mm front disc, 240mm rear disc), Agile Handling Chassis, Race-derived Suspension. Passive Features Passive Features: Sturdy Frame Construction, Protective Fairings, Seat Belt (N/A for Motorcycles), Airbags (N/A for Motorcycles). 💡 Technology Features Infotainment Infotainment System: N/A (Motorcycle of this era typically did not feature infotainment systems) Driver Assistance Driver Assistance Features: N/A (No electronic driver assistance features typically found on motorcycles of this vintage) Instrumentation Instrumentation Type: Analog speedometer, tachometer, coolant temperature gauge, odometer, trip meter, indicator lights (turn signals, high beam, neutral, oil warning). 🔧 Maintenance Service Intervals Oil Change Interval: Recommended every 3,000-5,000 km or annually, though specific interval depends on oil quality and usage. Always refer to the manual for precise recommendations. Spark Plug Replacement: Recommended every 5,000-10,000 km, depending on plug type and riding conditions. Air Filter Cleaning: Recommended every 3,000-5,000 km, or more frequently in dusty conditions. Chain Lubrication Adjustment: Lubricate every 500-800 km; adjust tension as needed (refer to manual for correct slack). Fluid Specifications Engine Oil Type: 2-stroke oil, JASO FD or higher specification, specifically designed for high-performance 2-stroke engines. (Consult manual for exact Aprilia specification, e.g., Agip/Eni). Coolant Type: Ethylene glycol-based antifreeze/coolant, typically a 50/50 mix with distilled water. Brake Fluid Type: DOT 4 (or DOT 5.1, check manual for compatibility and recommendations) Fork Oil Type: Typically SAE 5W or 7.5W fork oil (refer to manual for exact viscosity and quantity). Known Issues Known Issues: Wear on the...