🏷️ Basic Information Identification Make: Aprilia Model: V990 Engine Year: Not Specified (Covers multiple model years for V990 engine variants) Codes Engine Code: V990 Generation Engine Generation: V990 (used in various Aprilia models) 📋 Manual Details Coverage Areas Engine Mechanical: Complete Electrical System: Diagrams and troubleshooting Fuel System: Complete Cooling System: Complete Lubrication System: Complete Ignition System: Complete Exhaust System: Component identification and removal Maintenance Procedures: Routine and major service Troubleshooting Guides: Common issues and solutions Torque Specifications: All critical fasteners Special Tools: Required tools and their use Engine Rebuilding: Complete Wiring Diagrams: Included Emissions Controls: Component identification and function Diagnostic Procedures: For common electronic and mechanical faults Manual Type Unknown: Workshop Manual Language Unknown: English Format Unknown: PDF (Downloadable) Page Count Unknown: Not specified in product description, but comprehensive coverage implied ⚙️ Engine Specifications Primary Engine Engine Type: V-Twin Displacement: 990 cc Bore X Stroke: Not specified in product description, detailed in manual Valve Configuration: DOHC, 4 valves per cylinder (likely) Performance Power Output: Varies by model application (e.g., 105-130 hp typical for V990 variants) Torque Output: Varies by model application (e.g., 90-100 Nm typical for V990 variants) Fuel System Fuel Delivery: Fuel Injection (EFI) Throttle Body Size: Not specified in product description, detailed in manual Ignition System: Electronic Ignition Cooling System Cooling Method: Liquid-cooled Lubrication System Oil Type: Specific grades and capacities detailed in manual Oil Capacity: Not specified in product description, detailed in manual 🔧 Transmission Standard Type: Manual Gears: 6-speed (typical for V990 variants) Optional Type: Not applicable (this manual focuses on the engine itself) Features Clutch Type: Wet multi-plate (typical for V990 variants) 🔧 Maintenance Service Intervals Oil Change: Detailed in manual based on usage Spark Plug Replacement: Detailed in manual based on mileage/usage Valve Clearance Check: Detailed in manual based on mileage/usage Air Filter Replacement: Detailed in manual based on usage Fluid Specifications Engine Oil Grade: Specific grades provided in manual (e.g., Motul 300V 10W-40) Coolant Type: Specific types and mixture ratios provided in manual Brake Fluid Type: Specific types provided in manual (e.g., DOT 4) Gearbox Oil Type: Specific grades provided in manual Clutch Fluid Type: Specific types provided in manual (e.g., DOT 4 for hydraulic clutches) Chain Lubrication: Recommendations provided in manual