🏷️ Basic Information Identification Make: Aprilia Model: RS250 Year: 1994 Codes Chassis Code Prefix: AP02 👋 Introduction Market Position Segment: High-performance sportbike, renowned for its racing pedigree and potent two-stroke engine. Competitive Analysis Key Rivals 1994: Yamaha YZF750R, Suzuki GSX-R750, Kawasaki Ninja ZX-7R, Honda CBR900RR Fireblade (though larger displacement). Key Features Engine Type: V-twin, two-stroke, liquid-cooled, reed valve induction. Suspension Setup: Performance-oriented inverted front forks and a monoshock rear suspension for superior handling. Braking System: Dual front disc brakes with radial-mount calipers and a single rear disc brake. 📋 Manual Details Coverage Areas Languages Supported: English, Italian, Spanish Page Count Total Pages: 580 Manual Type Type: Service and Repair Manual Format Digital Format: PDF Features Bookmarks Included: Yes 📖 Manual Coverage Systems Covered Engine Service: Complete engine overhaul, including disassembly, inspection, and reassembly of internal components. Fuel System: Carburetor tuning, fuel pump inspection, fuel line maintenance, and tank service. Cooling System: Radiator service, water pump inspection, coolant flush and fill procedures, thermostat operation. Electrical System: Wiring diagrams, component testing, battery maintenance, ignition system diagnostics, lighting system service. Procedures Included Routine Maintenance: Oil changes, filter replacements, chain adjustment, brake fluid replacement, general inspection checklists. Troubleshooting: Diagnostic flowcharts for common starting, running, and electrical issues. Component Overhaul: Detailed steps for rebuilding the engine, transmission, forks, and rear shock. Technical Depth Level Of Detail: Comprehensive, suitable for professional technicians and experienced DIY mechanics. 📊 Manual Specifications File Format Quality: High-resolution PDF, optimized for clear viewing and printing. Print Quality Recommendation: Printable on standard office printers; color sections for diagrams and schematics are preserved. Binding Type Digital: N/A (Digital PDF) Paper Type Digital: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, 90-degree V-twin, two-stroke Displacement: 249 cc Bore X Stroke: 51.0 mm x 61.0 mm Compression Ratio: 7.5:1 (nominal) Valve Mechanism: Reed valve Ignition System: Digital CDI Lubrication: Pre-mix or Auto-lube oil injection system Performance Horsepower: Approximately 70 HP (at crankshaft, depending on market/tuning) Torque: Approximately 42 Nm (at crankshaft) Fuel System Carburetor Type: Dual Mikuni TM34SS flat-slide carburetors Fuel Type: Unleaded gasoline (minimum 95 octane recommended) Fuel Tank Capacity: 16 Liters (approx. 4.2 US Gallons) 🔧 Transmission Standard Type: 6-speed sequential manual Clutch Type: Wet multi-plate Features Gear Ratios: Refer to manual for specific gear ratios (e.g., 1st: 2.750, 2nd: 2.063, 3rd: 1.571, 4th: 1.292, 5th: 1.130, 6th: 0.960) Final Drive: Chain drive 📐 Dimensions Exterior Length: Approximately 1995 mm Width: Approximately 710 mm Height: Approximately 1150 mm Weights Dry Weight: Approximately 143 kg Wet Weight: Approximately 164 kg (with fluids) 🛡️ Safety Features Ratings Homologation Standard: Designed to meet then-current European and US safety standards for sportbikes. Active Features Braking System Front: Dual 320mm discs, 4-piston radial calipers (e.g., Nissin) Braking System Rear: Single 240mm disc, 2-piston caliper Suspension Front: 43mm inverted telescopic forks, adjustable preload, compression, and rebound damping (e.g., Marzocchi) Suspension Rear: Monoshock with adjustable preload, compression, and rebound damping (e.g., Sachs) Passive Features Lighting System: Dual halogen headlights, LED tail light Instrumentation: Analog tachometer, speedometer, coolant temperature gauge, digital clock, warning lights. 💡 Technology Features Infotainment System: Analog instrumentation focused on essential riding information, no modern infotainment features. Driver Assistance Features: None (performance-oriented sportbike of its era). Connectivity Features: None (analog systems). 🔧 Maintenance Service Intervals Oil Change: Every 3,000 km or 6 months (refer to manual for specific recommendation based on usage). Spark Plug Replacement: Every 6,000 km or as per manual specifications (e.g., NGK BR9EG). Chain Lubrication Adjustment: Every 1,000 km or more frequently under adverse conditions. Fluid Specifications Engine Oil Type: Two-stroke engine oil, specifically formulated for high-performance liquid-cooled engines (e.g., Motul 800 2T Factory Line Off Road). Coolant Type: Ethylene glycol-based coolant mixed with distilled water (50/50 ratio recommended). Brake Fluid Type: DOT 4 or DOT 5.1 hydraulic brake fluid. Transmission Oil Type: Specific transmission oil for wet clutches (e.g., SAE 10W-40 API SG). Known Issues Power Valve Sticking: Common for two-stroke engines, the power valve system can accumulate carbon deposits and stick, affecting performance. Requires regular cleaning and lubrication as detailed in the manual. Carburetor Sync: Can be sensitive to synchronization and jetting, especially with altitude changes or modifications. The manual provides detailed procedures for synchronization. Cooling System Leaks: As with many performance bikes, check for leaks from hoses, radiator, and water pump seals. 📚 Vehicle History Brand Heritage Manufacturer Origin: Aprilia, an Italian manufacturer renowned for its success in motorcycle racing, particularly in smaller displacement classes and Grand Prix events. Model Evolution Development Basis: Developed from Aprilia's extensive experience with Grand Prix racing, borrowing heavily from their RS250 Grand Prix machine and utilizing a Suzuki RGV250-derived engine. Production Production Period: 1995-2003 (though this manual specifically covers the 1994 model year introduction). Manufacturing Location: Noale, Italy 🏆 Awards & Recognition Recognitions Editorial Reviews: Consistently praised by motorcycle journalists for its exhilarating...