🏷️ Basic Information Identification Make: Aprilia Model: RS250 Year: 1998 Codes Engine Code Designation: 90° V-twin, 2-stroke 👋 Introduction Market Position Segment: Supersport Motorcycle Target Audience: Performance-oriented riders, track day enthusiasts, and owners seeking detailed maintenance and repair information. Competitive Analysis Key Competitors: Yamaha YZF-R6, Honda CBR600F, Kawasaki Ninja ZX-6R (though the RS250 is 2-stroke, it competed in a similar performance class). Key Features Unique Selling Proposition: Lightweight chassis, potent 2-stroke engine, race-derived technology, and exceptional handling characteristics. Manual Value Proposition: Provides essential technical data and procedures to maintain and repair a high-performance, often enthusiast-owned, 2-stroke sportbike. 📋 Manual Details Coverage Areas Primary Focus: Service, Repair, Workshop Page Count Estimated Pages: 300-400 Manual Type Type: Service Repair Workshop Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Engine: Complete engine disassembly, assembly, tuning, and troubleshooting of the 2-stroke V-twin powerplant. Transmission: Clutch, gearbox, shifting mechanism, and related components service and repair. Chassis: Frame inspection, suspension (forks, rear shock), steering head, and swingarm maintenance and repair. Braking System: Front and rear brake system servicing, including caliper rebuilds, fluid changes, and component replacement. Electrical System: Wiring diagrams, ignition system troubleshooting, lighting, battery, charging system, and sensor diagnostics. Fuel System: Carburetor (Mikuni TM28) tuning, cleaning, jetting, fuel pump, and fuel line maintenance. Cooling System: Radiator, hoses, coolant, and fan system maintenance and repair. Exhaust System: Expansion chamber maintenance, sealing, and removal/installation procedures. Bodywork And Fairings: Fairing removal, installation, and repair instructions. Procedures Included Routine Maintenance: Oil changes, chain adjustments, spark plug replacement, air filter cleaning/replacement, and general inspections. Troubleshooting: Diagnostic charts and step-by-step procedures for common and uncommon issues across all systems. Engine Rebuild: Complete top-end and bottom-end engine rebuild procedures, including piston, ring, and crankshaft replacement. Suspension Setup: Fork oil changes, spring preload adjustments, and rear shock adjustments. Carburetor Tuning: Detailed guidance on jetting, idle speed adjustment, and synchronization for optimal performance. Electrical Diagnostics: Step-by-step troubleshooting for ignition timing, fuel injection (if applicable, though RS250 is carb), and sensor faults. Technical Depth Depth: Comprehensive, from basic rider maintenance to full engine and gearbox overhauls, suitable for professional mechanics and advanced DIY enthusiasts. 📊 Manual Specifications File Format File Type: Searchable PDF Print Quality Resolution: High resolution for clear diagrams and text. Binding Type Format Note: Digital format, printable pages. Paper Type Format Note 2: N/A (Digital) ⚙️ Engine Specifications Primary Engine Configuration: 90° V-twin, liquid-cooled, 2-stroke Displacement: 249 cc Bore X Stroke: 54.0 mm x 54.5 mm Compression Ratio: 7.2:1 (approx.) Performance Horsepower: 70 hp @ 11,000 rpm (claimed) Torque: 34.2 lb-ft @ 10,500 rpm (claimed) Fuel System Carburetors: 2 x Mikuni TM28 flat-slide Fuel Type: Unleaded gasoline (95 RON or higher recommended) Oil Mixing System: Automatic oil injection system (separate oil reservoir) Ignition Ignition Type: Digital CDI (Capacitor Discharge Ignition) 🔧 Transmission Standard Type: 6-speed constant mesh Clutch: Wet multi-plate Features Gear Ratios: Manual will detail specific ratios for each gear. Final Drive: Chain drive 📐 Dimensions Exterior Length: Approx. 77.8 inches (1975 mm) Width: Approx. 27.6 inches (700 mm) Height: Approx. 43.5 inches (1105 mm) Weights Dry Weight: Approx. 348 lbs (158 kg) Wet Weight: Approx. 375 lbs (170 kg) (with fluids) Fuel Capacity: 4.5 gallons (17 Liters) Oil Capacity: Approx. 1.6 US quarts (1.5 Liters) (2-stroke oil reservoir) 🛡️ Safety Features Ratings Safety Certification: N/A (Motorcycle safety standards vary by region, but the design emphasizes rider control and stability). Active Features Braking System Type: Dual front disc brakes, single rear disc brake. Front Brake Spec: 320 mm discs, 4-piston calipers (typically Nissin). Rear Brake Spec: 240 mm disc, 2-piston caliper. Passive Features Chassis Design: Aluminium alloy twin-spar frame for rigidity and light weight. 💡 Technology Features Infotainment Features: N/A (Focus on pure performance, no advanced infotainment systems). Driver Assistance Features: N/A (No electronic rider aids beyond basic engine management and chassis dynamics). Performance Enhancements Power Valves: Electronic controlled power valves (APDC - Aprilia Performance Damping Control) for improved torque and power delivery across the rev range. 🔧 Maintenance Service Intervals Oil Change: Every 3,000-4,000 km or annually, whichever comes first (for engine oil, if applicable, though primarily 2-stroke oil injection is used). Spark Plug Replacement: Every 5,000-7,000 km, depending on usage and spark plug type. Air Filter Cleaning: Every 3,000-5,000 km, or as needed based on riding conditions. Chain Lubrication And Adjustment: Regularly, every 500-1000 km and before long rides. Coolant Flush: Every 2 years or 24,000 km. Fluid Specifications Engine Oil Type: High-quality 2-stroke synthetic oil specifically for high-performance motorcycles (e.g., Motul 800, Castrol TTS). Fork Oil Type: Generally 5W or 10W fork oil, specific viscosity detailed in the manual. Brake Fluid Type: DOT 4 (high-performance synthetic brake fluid). Coolant Type: Ethylene glycol-based coolant with corrosion inhibitors, mixed 50/50 with distilled water. Known Issues 2 Stroke Specifics: Wear on power valves, reed valve issues,...