🏷️ Basic Information Identification Make: Aprilia Model: RS 250 Model Years Covered: 1994, 1995, 1996, 1997, 1998 Codes Engine Code Range: Likely starts with AP022XXX or similar for the Suzuki-derived V-twin 👋 Introduction Market Position Segment: High-performance 250cc sportbike, iconic for its two-stroke engine and racing pedigree. Target Audience: Enthusiasts, mechanics, and owners seeking in-depth knowledge for maintenance and repair. Competitive Analysis Key Rivals: Honda NSR250R, Yamaha TZR250, Suzuki RGV250. Key Features Motorcycle Style: 2-stroke, V-twin, liquid-cooled, DOHC, reed valve induction. Handling Dynamics: Renowned for sharp handling and lightweight chassis, inspired by race bikes. Performance Emphasis: Focus on high RPM power delivery characteristic of 2-stroke engines. 📋 Manual Details Coverage Areas Primary Coverage: Complete workshop service and repair Geographic Coverage: Likely global, with emphasis on European and North American markets Page Count Estimated Page Count: 300-500 pages (typical for comprehensive workshop manuals) Manual Type Manual Type: Workshop Service Repair Manual Language Language: English (standard for most downloadable manuals unless specified otherwise) Format Format: Downloadable (PDF) 📖 Manual Coverage Systems Covered Engine: Disassembly, assembly, inspection, tuning, and troubleshooting of the V-twin two-stroke engine. Fuel System: Carburetor (Mikuni VM26SS) adjustment, cleaning, and rebuilding; fuel tank and lines. Ignition System: CDI ignition, spark plugs, wiring diagrams, timing. Cooling System: Radiator, hoses, thermostat, coolant specifications, bleeding procedure. Transmission: Clutch operation and adjustment, gearbox disassembly and reassembly, gear shift mechanism. Chassis Frame: Frame inspection, repair considerations, steering head bearing maintenance. Suspension Front: Front fork disassembly, seal replacement, oil level and type, damping adjustment. Suspension Rear: Monoshock absorber adjustment, linkage maintenance, spring pre-load. Brakes Front: Brake caliper maintenance, piston seals, brake fluid specifications, bleeding, disc inspection. Brakes Rear: Brake caliper maintenance, piston seals, brake fluid specifications, bleeding, disc inspection. Wheels Tires: Wheel bearing maintenance, tire pressure recommendations, tire sizes. Electrical System: Wiring diagrams, battery, charging system, lighting, instrumentation. Bodywork Fairings: Fairing removal and installation, seat, fuel tank removal. Exhaust System: Exhaust pipe and silencer maintenance, gasket replacement. Procedures Included Preventative Maintenance: Scheduled checks, lubrication points, fluid changes. Routine Maintenance: Oil changes, filter replacements, chain adjustment, spark plug replacement. Troubleshooting: Diagnostic flowcharts for common issues (e.g., starting problems, poor running). Engine Rebuild: Complete engine disassembly, cleaning, inspection, measurement, and reassembly of major components (pistons, cylinders, crankshaft). Suspension Overhaul: Front fork seal replacement, rear shock absorber service. Brake System Service: Brake fluid flushing and bleeding, caliper piston seal replacement. Carburetor Tuning: Idle speed, jetting adjustments, synchronization (if applicable). Electrical Diagnostics: Wiring harness checks, component testing. Technical Depth Depth: Comprehensive from basic maintenance to complete engine and chassis rebuilds. Diagnostics: Detailed diagnostic procedures and troubleshooting guides for various systems. Specifications: Includes all critical torque values, clearances, fluid capacities, and tolerances. 📊 Manual Specifications File Format File Type: PDF Searchability: Likely text-searchable PDF for efficient information retrieval. Print Quality Printability: Designed for printing key sections or the entire manual. Binding Type Binding Type: N/A (Downloadable Digital Format) Paper Type Paper Type: N/A (Downloadable Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, 2-stroke, V-twin, reed valve Displacement: 249 cc (249.3 cc) Bore X Stroke: 54.0 mm x 54.5 mm Compression Ratio: 7.5:1 (Typical for early models, may vary slightly) Cylinder Head: DOHC (Double Overhead Camshafts), 4 valves per cylinder (often referenced as 8 total, but the V-twin architecture means 4 per cylinder head) Valve Actuation: Reed Valve Induction Lubrication: Pre-mix or Auto-lube (Oil injection system) Performance Horsepower: Approx. 70-74 HP @ 11,000 RPM (dependent on market restrictions) Torque: Approx. 40-42 Nm @ 10,500 RPM Fuel System Carburetors: 2 x Mikuni VM26SS, flat-slide Fuel Type: Unleaded gasoline (95 RON or higher recommended) Fuel Tank Capacity: 16 Liters 🔧 Transmission Standard Transmission Type: 6-speed constant mesh Clutch: Wet, multi-plate, cable-actuated Features Gear Ratios: Provided in manual, essential for performance tuning. Final Drive: Chain drive (520 pitch, 108 links) 📐 Dimensions Exterior Length: Approx. 1985 mm Width: Approx. 700 mm Height: Approx. 1135 mm Wheelbase: Approx. 1375 mm Weights Dry Weight: Approx. 142 kg Wet Weight: Approx. 165 kg (fully fueled) 🛡️ Safety Features Ratings Safety Ratings: N/A (Motorcycles are not typically subject to the same crash safety ratings as cars). Active Features Braking System: Dual 320mm discs with 4-piston calipers (front), Single 240mm disc with 2-piston caliper (rear). Passive Features Lighting: Halogen headlight, LED tail light. 💡 Technology Features Infotainment Infotainment System: N/A (Focus is on performance and analogue riding experience). Driver Assistance Driver Assistance Features: N/A (Primarily mechanical systems, no electronic rider aids). Instrumentation Instrument Panel: Analogue speedometer, tachometer, engine temperature gauge, odometer, trip meter. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000-4,000 km or annually (for gearbox oil). Spark Plug Replacement: Every 5,000-7,000 km (e.g., NGK BR9EG or BR10EG). Air Filter Cleaning: Every 3,000-5,000 km. Chain Lubrication Adjustment: Every 500-800 km or after riding in wet conditions. Fluid Specifications Engine Oil Type: 2-stroke engine oil meeting API TC...