🏷️ Basic Information Identification Make: Aprilia Model: RS250 Year: 1998 Codes Internal Code: 945W 👋 Introduction Market Position Segment: High-performance 250cc sportbike, competing in the lightweight supersport class. Competitive Analysis Competitors: Primarily competed against bikes like the Yamaha YZF-R25, Honda CBR250RR (MC22), and Kawasaki ZXR250. Key Features Engine Type: Liquid-cooled, 72° V-twin, two-stroke engine derived from Suzuki RGV-gamma racing technology. Performance Focus: Renowned for its sharp handling, potent engine, and race-bred ergonomics. 📋 Manual Details Coverage Areas General Coverage: All Models/Engines/Tr... Manual Type Type: Workshop Repair Service Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine System: Comprehensive coverage of the V-twin two-stroke engine, including top-end, bottom-end, lubrication, cooling, and exhaust systems. Fuel System: Detailed information on carburetor tuning (Dell'Orto PHBH 28), fuel delivery, and fuel tank maintenance. Ignition System: Explains the electronic ignition system, spark plug specifications, and troubleshooting of ignition faults. Transmission System: Covers the six-speed gearbox, clutch operation, gearbox oil specifications, and internal component inspection. Chassis Suspension: Includes details on the frame, front fork (Showa upside-down), rear monoshock suspension (Sachs), and swingarm. Braking System: Provides specifications for the front dual disc brakes (Brembo) and rear single disc brake, including pad replacement and fluid specifications. Electrical System: Covers wiring diagrams, lighting, battery, starter motor, fuses, and troubleshooting common electrical issues. Bodywork And Fairings: Information on disassembly, assembly, and maintenance of body panels, fairings, and seating. Procedures Included Maintenance Tasks: Routine maintenance, oil changes, filter replacements, chain adjustment, brake fluid flush, coolant replacement, and spark plug replacement. Troubleshooting Guides: Diagnostic procedures for common problems such as starting issues, engine misfires, overheating, and electrical faults. Repair Procedures: Step-by-step instructions for engine rebuilding, gearbox overhaul, suspension servicing, brake caliper repair, and electrical component replacement. Diagnostic Procedures: Methods for diagnosing engine performance issues, electrical circuit faults, and mechanical component wear. Technical Depth Depth: Comprehensive coverage from basic maintenance to complete engine and transmission rebuilds, including detailed torque specifications and clearances. 📊 Manual Specifications File Format Quality: High-resolution PDF with clear, legible text and diagrams, optimized for digital viewing and printing. Print Quality Printability: Printable pages for easy on-the-go reference in a workshop environment. Binding Type Binding: N/A (Digital PDF) Paper Type Paper: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Configuration: 72° V-twin, liquid-cooled, two-stroke Displacement: 249 cc (15.2 cu in) Bore X Stroke: 54 x 54.5 mm (2.13 x 2.15 in) Compression Ratio: 7.5:1 (approx.) Power Output: Approximately 70 hp (52 kW) at 11,000 rpm (claimed) Torque: Approximately 40 Nm (29.5 lb-ft) at 10,500 rpm (claimed) Fuel System Carburetors: 2 x Dell'Orto PHBH 28 Fuel Type: Unleaded gasoline, minimum 95 RON (premium) Oil Mixing: Automatic oil injection system (separate oil reservoir) Lubrication Oil Type: API TC or JASO FD certified 2-stroke engine oil Cooling System Coolant Type: Ethylene glycol based coolant with anti-corrosion additives 🔧 Transmission Standard Type: 6-speed, constant mesh Features Clutch: Wet multi-plate, cable-operated Gear Ratios: Specific ratios detailed within the manual (e.g., 1st: 2.571, 2nd: 1.813, 3rd: 1.400, 4th: 1.136, 5th: 0.960, 6th: 0.838) Fluid Specifications Gearbox Oil: API GL-4, SAE 75W/90 or 10W/40 transmission oil. Capacity: 0.9 L 📐 Dimensions Exterior Length: Approx. 1965 mm (77.4 in) Width: Approx. 720 mm (28.3 in) Height: Approx. 1100 mm (43.3 in) Wheelbase: Approx. 1365 mm (53.7 in) Weights Dry Weight: Approx. 145 kg (319.7 lbs) Fuel Capacity: 16 L (4.2 US gal) 🛡️ Safety Features Ratings Crash Safety: Not applicable (motorcycle) Active Features Braking: Dual front hydraulic disc brakes, single rear hydraulic disc brake. Suspension: Adjustable front forks and rear monoshock for enhanced stability and control. Passive Features Frame Construction: Lightweight aluminum twin-spar frame for rigidity and agility. 💡 Technology Features Infotainment Features: N/A (Analog instruments, no modern infotainment) Driver Assistance Features: N/A (Focus on rider skill and mechanical systems) 🔧 Maintenance Service Intervals Oil Change Engine: Every 3,000-5,000 km or annually. Check oil level more frequently. Spark Plug Replacement: Every 6,000-10,000 km, depending on type and usage. Specific plug: NGK BR9ES or equivalent. Chain Cleaning Lubrication: Every 500-800 km and after riding in wet conditions. Brake Fluid Flush: Every 2 years or as per manual recommendation. Fluid Specifications Coolant Capacity: Approx. 1.5 L (check manual for exact capacity and coolant ratio) Brake Fluid Type: DOT 4 (or DOT 3 if specified by Aprilia for specific components) Known Issues Power Valve Sticking: Common issue with two-stroke engines; requires regular cleaning and lubrication of the exhaust powervalves. Carburetor Sync And Cleaning: Dell'Orto carbs can require regular cleaning and proper synchronization for optimal performance. Clutch Wear: Clutch plates can wear over time due to the nature of the two-stroke engine's power delivery. Oil Pump Reliability: While generally reliable, the oil injection pump should be inspected periodically for proper function and calibration. 📚 Vehicle History Brand Heritage Manufacturer: Aprilia is an Italian manufacturer with a strong racing...