🏷️ Basic Information Identification Make: Aprilia Model: MY 660 Factory Product Type: Factory Service Repair Manual 👋 Introduction Market Position Segment: High-performance sport motorcycle engine Competitive Analysis Competitors: Engines from comparable manufacturers in the 660cc sportbike segment (e.g., Yamaha MT-07/R7, Kawasaki Ninja 650, Triumph Trident 660/Street Triple R). Key Features Engine Type: Parallel-twin, liquid-cooled, DOHC, 4-valve per cylinder Technology: Advanced electronic rider aids (likely derived from Aprilia's extensive racing experience), ride-by-wire throttle, multi-mode engine mapping. 📋 Manual Details Coverage Areas Primary Coverage: Engine Service and Repair for Aprilia MY 660 Page Count Estimated Pages: High (Detailed manual, likely 300+ pages based on typical factory service manuals for motorcycles) Manual Type Type: Factory Service Repair Manual Language Language: English (Standard for factory service manuals, though other languages may exist for specific markets) Format Format: Digital (PDF - common for downloadable service manuals) 📖 Manual Coverage Systems Covered Engine Mechanical: Cylinder head, valve train, piston and connecting rod assembly, crankshaft, crankcase, oil pump, water pump, lubrication system, cooling system Fuel System: Fuel injection system (EFI), throttle body assembly, injectors, fuel pump, fuel filter, fuel pressure regulator Ignition System: Ignition coils, spark plugs, ignition control module (ICM) Exhaust System: Exhaust manifold, catalytic converter (if applicable), muffler assembly, lambda sensors (O2 sensors) Electrical System: Wiring diagrams, battery, starter motor, alternator/generator, ECU (Engine Control Unit), sensors (crankshaft position, camshaft position, intake air temperature, coolant temperature, etc.) Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug replacement, air filter cleaning/replacement, coolant checks and flushes Disassembly Assembly: Complete engine disassembly and reassembly procedures with torque specifications Troubleshooting: Diagnostic procedures for common engine problems, fault code interpretation, symptom-based troubleshooting guides Component Testing: Testing procedures for fuel injectors, sensors, ignition components, and electrical circuits Recalibration Adjustments: Throttle body synchronization, idle speed adjustment (if applicable), basic ECU parameter checks Technical Depth Depth: Comprehensive. Covers everything from basic fluid changes to full engine rebuilds and diagnostics. Diagnostic Level: Advanced. Includes detailed troubleshooting flowcharts, component testing, and likely diagnostic trouble code (DTC) definitions. Rebuild Scope: Full engine rebuild. Provides specifications for machining, clearances, torque values, and assembly sequences. 📊 Manual Specifications File Format Format: PDF Searchability: Likely searchable text, allowing for quick keyword-based information retrieval. Print Quality Quality: High-resolution diagrams and images, suitable for printing if desired. Binding Type Binding: N/A (Digital Format) Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Code: Likely internal Aprilia code specific to the 660cc platform (e.g., V466, but specific code not provided) Configuration: Parallel-twin (inline-twin) Displacement: 659cc Bore X Stroke: Typically around 81 mm x 63.94 mm for the 660 platform. Compression Ratio: Around 13.5:1 (typical for high-performance sportbike engines of this era). Valvetrain: DOHC (Double Overhead Camshaft), 4 valves per cylinder Performance Horsepower: Approximately 100 hp (based on Aprilia RS 660 and Tuono 660 figures). Torque: Approximately 67 Nm (6.8 kgf-m, 49.4 lb-ft) at around 8,500 rpm. Fuel System Induction: Electronic Fuel Injection (EFI) with ride-by-wire throttle control Throttle Bodies: Dual 48mm throttle bodies Fuel Type: Unleaded gasoline (Octane rating typically 95 RON or higher recommended) Cooling System Cooling Type: Liquid-cooled Lubrication System Type: Forced lubrication with wet sump Oil Type: High-quality synthetic motorcycle engine oil, API SG/SH/SJ or higher, JASO MA/MA2 certified. Viscosity typically 10W-40 or 15W-50 depending on ambient temperature. (Specific Aprilia recommendation required from manual). Oil Capacity: Approximately 2.4 liters (with filter change). (Specific capacity from manual). 🔧 Transmission Standard Type: 6-speed sequential gearbox Clutch: Multi-plate wet clutch with hydraulic actuation Features Quick Shifter: Likely equipped with a bi-directional quickshifter (Aprilia Quick Shift) as standard on the 'Factory' model. Final Drive: Chain drive Fluid Type Transmission Oil: Specific motorcycle gear oil, typically SAE 75W-90 or 80W-90 API GL-4 or GL-5. (Specific Aprilia recommendation required from manual). 📐 Dimensions Exterior Wheelbase: Approximately 1370 mm (53.9 inches) for the RS 660 model. Weights Dry Weight: Approximately 169 kg (373 lbs) for the RS 660 model. Wet Weight: Approximately 183 kg (403 lbs) with fluids for the RS 660 model. 🛡️ Safety Features Ratings Certification: CE (Conformité Européenne) compliant for emissions and noise regulations in relevant markets. Active Features Traction Control: Advanced multi-level Aprilia Traction Control (ATC) system, likely adjustable. ABS: Cornering ABS system with adjustable levels. Engine Brake Control: Adjustable Aprilia Engine Brake Control (AEB). Wheelie Control: Aprilia Wheelie Control (AWC), likely integrated with ATC. Ride Modes: Multiple selectable ride modes (e.g., Commute, Sport, Race) affecting engine power delivery, traction control, and ABS settings. Passive Features Lighting: Full LED lighting system including DRLs (Daytime Running Lights) and cornering lights. 💡 Technology Features Infotainment Dashboard: Full-color TFT instrument cluster providing comprehensive vehicle information, ride mode selection, and connectivity features. Driver Assistance Electronic Suite: Aprilia Performance Ride Control (APRC) suite including ATC, AEB, AWC, and selectable engine maps. Connectivity Multimedia: Optional Aprilia MIA (Multimedia Platform) connectivity, allowing smartphone integration for...