🏷️ Basic Information Identification Make: Aprilia Model: RS250 Year: 1995 Product Type: Full Service Repair Manual Codes Vehicle Chassis Code: AP0810 Engine Code Prefix: GSB 👋 Introduction Market Position Segment: Lightweight Supersport / Two-Stroke Performance Motorcycle Reputation: Highly regarded for its potent two-stroke engine and sharp handling, often considered a homologation special. Competitive Analysis Key Competitors: Yamaha YZF-R6 (later models), Suzuki RGV250, Kawasaki KR-1S Key Features Engine Type: Liquid-cooled, 75-degree V-twin, two-stroke Power Delivery: Aggressive, high-revving powerband characteristic of performance two-strokes. Chassis Design: Aluminium twin-spar frame derived from Aprilia's racing experience. 📋 Manual Details Coverage Areas Market Scope: Global Regional Variations Covered: Likely covers standard international specifications, potential for regional differences noted in manual. Page Count Estimated Page Count: 300+ Manual Type Type: Service Manual / Repair Manual Language Language: English Format Format: Digital (likely PDF) 📖 Manual Coverage Systems Covered Engine: Comprehensive engine overhaul, tuning, lubrication, cooling, fuel delivery, ignition. Transmission: Gearbox disassembly, assembly, clutch service, shift mechanism. Chassis: Frame inspection, steering head, suspension (front forks, rear shock), swingarm. Brakes: Front and rear brake systems, caliper service, master cylinder, hydraulic lines, fluid replacement. Electrical: Wiring diagrams, lighting, ignition system, charging system, starter, battery, troubleshooting. Fuel System: Carburetor service (Mikuni T M34), fuel tank, petcock, fuel lines. Exhaust System: Two-stroke exhaust manifold and silencer service. Cooling System: Radiator, hoses, thermostat, coolant specifications and replacement. Bodywork: Fairing removal and installation, seat, fuel tank installation. Wheels And Tires: Tire types, pressures, wheel bearing service. Procedures Included Maintenance: Routine checks, oil changes, filter replacements, chain adjustment, spark plug replacement. Troubleshooting: Diagnostic flowcharts, common fault identification and rectification. Repair: Detailed step-by-step repair procedures for all major components. Rebuild: Complete engine and gearbox rebuild instructions. Adjustment: Carburetor synchronization, idle speed, ignition timing (if applicable). Disassembly Assembly: Component-level disassembly and reassembly for repair. Specifications: Torque values, clearances, fluid capacities, electrical tolerances. Technical Depth Level: Comprehensive: From basic owner maintenance to full engine and component rebuilds. Detail Level: Highly detailed with specific measurements, diagrams, and troubleshooting guides. 📊 Manual Specifications File Format Format: PDF Searchability: Searchable text content for quick information retrieval. Print Quality Resolution: High resolution for clear diagrams and text. Binding Type Binding: N/A (Digital Format) Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Configuration: Liquid-cooled, 75° V-twin, two-stroke Displacement: 249.2 cc Bore X Stroke: 54 x 54.5 mm Compression Ratio: 7.0:1 (at discharge opening) Valvetrain: Reed valve induction, Reed Jet (RJ) rotary valve system on crankcase Cooling System: Liquid cooling with radiator and fan Performance Horsepower Max: 70 hp (52 kW) @ 11,000 rpm (claimed) Torque Max: 4.04 kgf·m (39.6 N·m; 29.2 lb·ft) @ 10,500 rpm (claimed) Fuel System Carburetors: 2 x Mikuni T M34 SS flat slide carburetors Fuel Type: Unleaded gasoline (minimum 95 RON recommended), 2-stroke oil pre-mix required Oil Delivery: Automatic oil injection (separate oil tank) 🔧 Transmission Standard Type: 6-speed constant mesh Gear Ratios: Refer to manual for specific gear ratios. Features Clutch Type: Wet multi-plate, cable-actuated Final Drive: Chain drive 📐 Dimensions Exterior Length: Approx. 1990 mm (78.3 in) Width: Approx. 710 mm (28.0 in) Height: Approx. 1140 mm (44.9 in) Wheelbase: Approx. 1370 mm (53.9 in) Weights Dry Weight: Approx. 140 kg (308.6 lbs) Wet Weight: Approx. 158 kg (348.3 lbs) (estimated, with fluids) Fuel Capacity: 16 Litres (4.2 US gal) 🛡️ Safety Features Ratings Classification: Sport Motorcycle Active Features Braking System: Dual 320mm discs with 4-piston calipers (front), Single 220mm disc with 2-piston caliper (rear) Suspension Front: Telescopic forks with adjustable preload and damping (upside-down type) Suspension Rear: Monoshock with adjustable preload and damping Passive Features Lighting: Halogen headlight, LED tail light 💡 Technology Features Infotainment System: N/A (focus on performance, not infotainment) Driver Assistance Features: N/A (focus on rider control and mechanical systems) Performance Tech Power Valves: Electronic Power Valve (EPV) system for improved torque across the rev range, detailed adjustment and maintenance in manual. 🔧 Maintenance Service Intervals Oil Change: Refer to manual for specific intervals, typically every 3,000-5,000 km for gearbox oil. Engine Top End Rebuild: Recommended every 15,000-20,000 km for optimal performance, detailed in manual. Spark Plugs: Inspect/replace every 6,000-8,000 km, specific types recommended in manual. Chain Maintenance: Lubricate and adjust chain tension every 500-1000 km. Fluid Specifications Engine Oil: High-quality 2-stroke motorcycle oil, pre-mix ratio specified in manual (e.g., 100:1 or 50:1 depending on oil type). Gearbox Oil: SAE 75W/90 or 10W/40 API GL-4 transmission oil. Capacity: 0.8 Litres. Coolant: Ethylene glycol-based coolant with corrosion inhibitors, 50/50 mix with distilled water. Capacity: Approx. 1.8 Litres. Brake Fluid: DOT 4 or DOT 5.1 hydraulic brake fluid. Known Issues Common Wear Items: Piston rings, reed valves, clutch plates, power valve mechanism, exhaust power valves due to two-stroke nature. Maintenance Sensitivity: Highly sensitive to proper jetting, lubrication, and adherence to maintenance schedules. Poorly maintained engines can suffer premature wear. Electrical Gremlins:...