🏷️ Basic Information Identification Make: Aprilia Model: V990 Engine Code: V990 Vehicle Type: Sportbike/Superbike Motorcycle Codes Chassis Codes: Vary by specific model year and variant (e.g., RSV Mille, Tuono, Falco) Engine Codes Specific: V990 (general designation for the 990cc V-twin engine) 👋 Introduction Market Position Target Audience: Owners, amateur mechanics, and professional technicians working on Aprilia V990 motorcycles. Value Proposition: Empowers users to perform correct procedures, prevent premature failure, and save time and money on maintenance and repairs. Competitive Analysis Resource Type: Essential technical resource for specialized Italian motorcycle marque. Key Features Readability: Easy-to-read type, designed for clarity and user comprehension. Comprehensiveness: Provides all necessary information for correct procedure execution. 📋 Manual Details Coverage Areas Overall Coverage: Comprehensive engine service and repair for Aprilia V990 models. Specific Models Covered: Likely covers multiple Aprilia models utilizing the V990 engine, such as RSV Mille, Tuono, Falco, Caponord (engine service aspects). Page Count Estimated Page Count: Estimated 300-500 pages (typical for comprehensive service manuals). Manual Type Manual Type: Workshop Service Repair Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Engine removal and installation, disassembly, reassembly, cylinder head, cylinder, piston, crankshaft, clutch, oil pump, water pump. Ignition System: Ignition unit diagnostics and service. Cooling System: Water pump service and related cooling system components. Lubrication System: Oil pump service and lubrication system maintenance. Starting System: Electric starter service. Procedures Included Routine Maintenance: Preventive maintenance procedures, fluid changes, component checks. Major Repairs: Complete engine rebuilds, component overhauls, and replacements. Disassembly Reassembly: Step-by-step instructions for complete engine teardown and rebuild. Troubleshooting: Implied ability to diagnose issues based on component service and maintenance information. Technical Depth Depth Of Coverage: Intermediate to Advanced. Suitable for technicians and experienced amateurs performing in-depth engine work. 📊 Manual Specifications File Format File Type: PDF Searchability: Likely text-searchable if properly created, allowing for quick information retrieval. Printability: Printable for physical use in a workshop environment. Compatibility: Compatible with all versions of Windows and Mac operating systems via Adobe PDF Reader. Software Requirement: Adobe PDF Reader (or compatible viewer). Print Quality Print Quality Expectation: High-quality digital reproduction of original factory documentation, including clear diagrams and text. Binding Type Binding Type: Digital (PDF) - not applicable for physical binding. Paper Type Paper Type: Digital (PDF) - not applicable for physical paper type. ⚙️ Engine Specifications Primary Engine Engine Configuration: 90-degree V-twin, four-stroke, liquid-cooled Displacement: 990cc (approximately, depending on specific model variant) Bore X Stroke: Varies slightly by model, typically around 97 mm x 68 mm Valve Train: DOHC, 4 valves per cylinder Compression Ratio: Typically around 11.8:1 to 12.7:1 depending on specific model. Performance Horsepower Range: Approx. 120-130 HP (at crankshaft) for most V990 variants. Torque Range: Approx. 95-100 Nm (at crankshaft) for most V990 variants. Fuel System Fuel Delivery: Electronic Fuel Injection (EFI), often with dual injectors per cylinder. Ignition System: Digital electronic ignition with variable ignition timing. 🔧 Transmission Standard Transmission Type: 6-speed constant mesh sequential gearbox Optional Optional Transmission: Not applicable; standard for the engine. Features Clutch Type: Hydraulically operated, wet multi-plate clutch. Final Drive: Chain drive 📐 Dimensions Exterior Engine Layout: Longitudinal V-twin Weights Engine Dry Weight: Approximately 60-70 kg (estimated, without fluids). 🛡️ Safety Features Ratings Vehicle Safety Systems: Varies by model year and trim. Early models may lack ABS, later models may have ABS. This manual focuses on engine, not vehicle safety electronics. Active Features Engine Safety Features: Electronic fuel injection for precise control, robust engine construction. Passive Features Engine Reliability: Designed for performance and durability when properly maintained. 💡 Technology Features Infotainment Infotainment Systems: Not applicable to engine service manual; applies to motorcycle's dashboard and control systems. Driver Assistance Engine Management: Advanced ECU (Engine Control Unit) managing fuel injection and ignition timing. Connectivity Diagnostics: Likely requires specialized diagnostic tools for ECU reading and parameter adjustments, although this manual details mechanical aspects. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 4,000-6,000 miles or annually, whichever comes first (refer to specific model's owner's manual or this service manual). Valve Clearance Check: Recommended every 12,000-16,000 miles. Spark Plug Replacement: Typically every 8,000-12,000 miles. Fluid Specifications Engine Oil Type: API SG or higher, JASO MA certified motorcycle oil, SAE 10W-40 or 15W-50 depending on ambient temperature (consult manual for specifics). Coolant Type: Ethylene glycol-based antifreeze mixture with distilled water (typically 50/50). Clutch Fluid: DOT 4 or DOT 5.1 brake fluid (check manual for exact specification). Brake Fluid: DOT 4 brake fluid. Known Issues Common Wear Items: Cam chain tensioners (can become noisy/fail), starter sprag clutch (can slip), water pump seals (potential leaks), clutch slave cylinder seals. Performance Enhancements: While not a 'known issue', this manual would be crucial for owners looking to upgrade components or tune the engine. 📚 Vehicle History Brand Heritage Manufacturer: Aprilia is an Italian motorcycle manufacturer renowned for its performance...