🏷️ Basic Information Identification Make: Aprilia Model: MY 660 Engine Codes Engine Code Family: 660cc Parallel Twin 👋 Introduction Market Position Target Audience: DIY enthusiasts, independent repair shops, and Aprilia motorcycle owners. Competitive Analysis Value Proposition: Provides in-depth technical guidance, empowering users to perform complex repairs and maintenance, saving costs compared to dealership services. Key Features Emphasis: Detailed diagrams, step-by-step instructions, troubleshooting guides, and essential technical specifications. 📋 Manual Details Coverage Areas Primary Coverage: Service and Repair Page Count Estimated Page Count: Variable (Digital Download - Comprehensive) Manual Type Type: Service and Repair Manual Language Language: English (Likely, based on typical product descriptions for this market) Format Format: Downloadable Digital File (PDF) 📖 Manual Coverage Systems Covered Engine Mechanical: Engine assembly, disassembly, internal components, cylinder head, pistons, crankshaft, camshafts, valve train. Fuel System: Fuel injection system, injectors, fuel pump, fuel pressure regulator, throttle body management. Lubrication System: Oil pump, oil filter, oil passages, oil pressure testing, oil cooler (if applicable). Cooling System: Radiator, water pump, thermostat, coolant passages, fan operation, pressure testing. Ignition System: Spark plugs, ignition coils, ECU control, timing. Electrical System Engine: Wiring diagrams specific to engine control, sensor inputs (e.g., crank position, cam position, TPS, MAP), actuator outputs (e.g., injectors, ignition coils). Exhaust System: Exhaust manifold, catalytic converter (if applicable), muffler, emissions control components. Engine Management System: ECU diagnostics, sensor readings, actuator control, fault code interpretation, basic troubleshooting. Procedures Included Routine Maintenance: Oil change procedures, filter replacement, spark plug replacement, coolant flush and fill. Major Repairs: Engine rebuilds, piston ring replacement, bearing replacement, valve adjustments, head gasket replacement. Troubleshooting: Diagnostic steps for common engine performance issues, starting problems, misfires, overheating. Component Testing: Procedures for testing fuel injectors, ignition coils, sensors, and actuators. Torque Specifications: Detailed torque values for all critical fasteners during assembly and disassembly. Technical Depth Depth: Comprehensive: Covers from basic maintenance to full engine overhaul and diagnostics. 📊 Manual Specifications File Format File Quality: High-resolution, searchable PDF with clear diagrams and text. Print Quality Printability: Printable pages for workshop use. Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: 660cc Liquid-Cooled, Four-Stroke, Parallel-Twin Bore X Stroke: Typically around 78 mm x 69 mm (specifics may vary slightly with model year revisions) Valve Train: DOHC, 4 valves per cylinder Performance Horsepower Output: Approx. 95-100 HP (varies by model and tuning, e.g., Aprilia RS 660, Tuono 660) Torque Output: Approx. 67 Nm (6.8 kgf-m, 49.4 lb-ft) (varies by model) Fuel System Fuel Delivery: Electronic Fuel Injection (EFI) with ride-by-wire throttle Fuel Type: Unleaded gasoline (95 RON recommended) Internal Components Compression Ratio: Typically around 13.5:1 🔧 Transmission Standard Transmission Type: 6-speed Sequential Manual Optional Quickshifter: Available (Aprilia Quick Shift) for upshifts and downshifts on certain models. Features Clutch Type: Wet, multi-plate clutch with assist and slipper function. 📐 Dimensions Exterior Engine Configuration: Compact parallel-twin, designed for a balance of power and agility. Weights Engine Weight Approx: Approximately 47 kg (dry weight, without ancillaries) 🛡️ Safety Features Active Features Traction Control: Multi-level APRC (Aprilia Performance Ride Control) traction control system. Wheelie Control: Integrated into APRC system. Engine Braking Control: Adjustable engine brake control (AEB). ABS: Cornering ABS (Anti-lock Braking System). Passive Features Lighting System: Full LED lighting with DRL (Daytime Running Light). 💡 Technology Features Infotainment Display Type: Full-color TFT display (on applicable motorcycle models). Driver Assistance Ride Modes: Multiple selectable ride modes (e.g., Sport, Street, Rain) influencing engine power delivery and traction control settings. Connectivity Bluetooth Connectivity: Optional connectivity via Aprilia MIA system for smartphone integration (navigation, calls, music). Engine Control Unit ECU Features: Advanced ECU managing engine parameters, rider aids, and diagnostics. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 10,000 km (6,200 miles) or annually. Valve Check Interval: Typically at 20,000 km (12,400 miles) or as specified in detailed service bulletins. Spark Plug Replacement Interval: Typically at 20,000 km (12,400 miles). Fluid Specifications Engine Oil Type: SAE 5W-40 Synthetic Engine Oil, meeting API SG or higher and JASO MA or MA2 specifications (e.g., Motul 7100 5W-40). Engine Oil Capacity: Approximately 2.7 liters (2.9 US qt) with oil filter change. Coolant Type: Ethylene glycol based coolant with anticorrosive additives, typically a 50/50 mix with distilled water. Known Issues Common Wear Items: Clutch plates (depending on riding style), chain and sprockets, brake pads. Potential Diagnostics: Intermittent sensor faults, ECU mapping updates may be required for optimal performance and emission compliance. 📚 Vehicle History Brand Heritage Aprilia Legacy: Aprilia has a long history of performance-oriented motorcycles, known for racing technology and innovative engineering. Model Evolution 660 Platform Introduction: The 660cc parallel-twin engine platform was introduced by Aprilia for the 2020/2021 model year, initially in the RS 660 sportbike, and later in the Tuono 660 naked bike, and later the Tuareg 660 adventure bike. It represents a significant modernization...