🏷️ Basic Information Identification Make: Aprilia Model: Tuono V990 Model Variant: V990 Years Covered: 2002, 2003, 2004, 2005 Codes Engine Code: Rotax 990 V-Twin 👋 Introduction Market Position Segment: High-performance naked sportbike Target Audience: Enthusiast owners, independent motorcycle mechanics, service technicians. Competitive Analysis Competitors: Ducati Monster series, Triumph Speed Triple, Yamaha FZ1, Suzuki Bandit 1200/1250. Key Features Bike Identity: Known for its potent V-twin engine, aggressive styling, and sharp handling. Manual Value Proposition: Provides the critical technical data required to maintain and repair this complex Italian motorcycle. 📋 Manual Details Coverage Areas Manual Scope: Complete Workshop Service Repair Page Count Estimated Page Count: 500+ Manual Type Type: Workshop Service and Repair Manual Language Language: English Format Format: Downloadable PDF 📖 Manual Coverage Systems Covered Engine: Complete overhaul, tuning, fuel injection, ignition system, cooling system, lubrication system, engine internals (pistons, valves, camshafts, crankshaft), engine mounting. Transmission: Gearbox assembly, clutch operation, shift mechanism, gear ratios, lubrication. Chassis: Frame inspection and repair, suspension (front forks, rear shock absorber), steering system, wheel bearings. Brakes: Hydraulic system, brake calipers, master cylinders, brake fluid, disc replacement, bleeding procedures. Electrical: Wiring diagrams, battery, charging system, ignition system, lighting, starter motor, sensors, ECU (Engine Control Unit) diagnostics. Fuel System: Fuel injection system (throttle bodies, injectors, fuel pump, pressure regulator), fuel tank, fuel lines. Exhaust System: Exhaust manifold, mufflers, catalytic converter (if applicable), lambda sensors. Bodywork: Fairing removal and installation, seat, handlebars, mirrors. Procedures Included Maintenance: Regular servicing, oil changes, filter replacements, chain adjustment, spark plug checks, brake pad replacement, coolant checks, battery maintenance. Repair: Engine rebuilds, transmission repairs, clutch replacement, fork seal replacement, electrical component troubleshooting and replacement, brake system overhauls. Troubleshooting: Diagnostic procedures for common faults, error code interpretation (if applicable), step-by-step fault finding guides. Calibration: Throttle body synchronization, idle speed adjustment, ECU remapping basics (if covered). Torque Specs: Detailed torque specifications for all critical fasteners. Technical Depth Depth: Comprehensive from basic maintenance to full engine and transmission rebuilds, including electrical diagnostics and chassis adjustments. 📊 Manual Specifications File Format File Type: PDF Searchability: Text-searchable PDF for quick information retrieval. Print Quality Printability: High-resolution, printable pages for workshop use. Binding Type Binding: N/A (Digital Download) Paper Type Paper Quality: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: V-Twin, Four-stroke Displacement: 998 cc (997.9 cc) Bore X Stroke: 97 x 67.5 mm Valvetrain: DOHC, 4 valves per cylinder Cooling System: Liquid-cooled Compression Ratio: 11.4:1 Performance Horsepower: Approx. 125-130 hp @ 9,500 rpm (model dependent) Torque: Approx. 98-100 Nm (72-74 lb-ft) @ 7,500 rpm (model dependent) Fuel System Fuel Delivery: Electronic Fuel Injection (Weber Marelli ECU) Throttle Body Size: Dual 54mm throttle bodies Fuel Type: Unleaded gasoline, minimum 95 RON Ignition System Ignition Type: Digital electronic ignition Lubrication System Oil Capacity: Approx. 3.2 liters (3.4 US qt) Oil Filter Part Number: Refer to manual for specific OEM/aftermarket part numbers (e.g., HF153, 26300-32200 compatible). 🔧 Transmission Standard Transmission Type: 6-speed sequential manual Clutch Type: Wet, multi-plate with hydraulic actuation Features Gear Ratios: Specific ratios detailed in manual (e.g., 1st: 2.46, 2nd: 1.88, 3rd: 1.50, 4th: 1.25, 5th: 1.09, 6th: 0.96). Final Drive: O-ring sealed chain 📐 Dimensions Exterior Length: Approx. 2,090 mm (82.3 in) Width: Approx. 790 mm (31.1 in) Height: Approx. 1,100 mm (43.3 in) Wheelbase: Approx. 1,410 mm (55.5 in) Weights Dry Weight: Approx. 185 kg (408 lbs) Wet Weight: Approx. 207 kg (456 lbs) Fuel Tank Capacity: 18 liters (4.75 US gal) 🛡️ Safety Features Ratings Safety Features Focus: High-performance braking system, stable chassis. Active Features Brakes Front: Dual 320mm discs, radial-mount 4-piston calipers (Brembo) Brakes Rear: Single 220mm disc, 2-piston caliper (Brembo) Suspension Front: 43mm upside-down forks (e.g., Showa or Marzocchi), adjustable preload, compression, and rebound damping. Suspension Rear: Monoshock, adjustable preload, compression, and rebound damping. Passive Features Lighting: Halogen headlights, LED taillight. 💡 Technology Features Infotainment Instrument Cluster: Analog tachometer, digital speedometer, odometer, trip meters, coolant temperature gauge, clock. Driver Assistance Engine Management: Advanced ECU with fuel injection and ignition mapping. Connectivity Diagnostic Ports: On-board diagnostic port for ECU communication and fault code retrieval. 🔧 Maintenance Service Intervals Oil Change Interval: Every 6,000 km (3,700 miles) or 12 months. Air Filter Cleaning: Every 6,000 km (3,700 miles) or 12 months. Spark Plug Replacement: Every 12,000 km (7,500 miles) or 24 months. Chain Maintenance: Lubricate and adjust every 1,000 km (600 miles). Fluid Specifications Engine Oil Type: API SG/SH/SJ or JASO MA/MA2, SAE 10W-40 or 15W-50 synthetic motorcycle oil. Coolant Type: Ethylene glycol-based antifreeze with corrosion inhibitors, 50/50 mix with distilled water. Brake Fluid Type: DOT 4 or DOT 5.1 brake fluid. Fork Oil Type: Refer to manual for specific viscosity (e.g., SAE 5W or 10W). Known Issues Common Faults: Potential for stator failure, voltage regulator issues, occasional fuel pump issues, exhaust valve actuator problems, cam chain tensioner wear. Maintenance Tips: Regular checks of...