🏷️ Basic Information Identification Make: Aprilia Model: RS 660 / Tuono 660 (MY 660 Engine) Codes Engine Code Family: APX (Aprilia Parallel-twin Architecture) 👋 Introduction Market Position Vehicle Segment: Sportbike (RS 660) and Naked Sportbike (Tuono 660) - middleweight performance segment. Competitive Analysis Key Competitors: Yamaha YZF-R7, Yamaha MT-07, Kawasaki Ninja 650, Kawasaki Z650, Honda CBR650R, Honda CB650R, Suzuki GSX-R750 (older models), Triumph Trident 660. Key Features Aprilia 660 Platform Philosophy: Designed as a versatile and accessible platform, blending sporty performance with everyday usability. Focus on lightweight construction, advanced electronics, and characterful engine. 📋 Manual Details Coverage Areas Primary Models Covered: Aprilia RS 660, Aprilia Tuono 660 Model Years Covered: Typically covers the initial model year and subsequent variations of the MY660 platform. Specific year range depends on manual edition, but commonly includes 2020, 2021, 2022, 2023 onwards. Page Count Estimated Page Count: Approximately 400-600 pages (dependent on edition and detail level). Manual Type Manual Type: Full Service and Repair Manual Language Language: English (primary language for official manuals; translations may vary for aftermarket versions). Format Format: Likely a Digital format (PDF) for widespread distribution and easy searching. May also be available in printed version. 📖 Manual Coverage Systems Covered Engine Mechanical: Complete engine overhaul, disassembly, inspection, assembly, timing, valve clearance, piston and ring replacement, crankshaft and connecting rod service, cylinder head service, lubrication system, cooling system. Engine Electrical: Ignition system, fuel injection system, starting system, charging system, ECU operation, sensors, actuators, wiring diagrams, fault diagnosis, troubleshooting. Transmission: Gearbox disassembly, inspection, assembly, gear selection mechanism, clutch operation, lubrication, troubleshooting. Chassis And Suspension: Frame inspection, front fork service (dismantling, oil change, seal replacement), rear shock absorber service, swingarm maintenance, steering head bearings, wheel bearing service. Brakes: Brake system components (master cylinders, calipers, discs, lines), bleeding procedures, brake pad replacement, ABS system diagnostics. Electrical System General: Lighting system, battery maintenance, wiring harness inspection, fuses and relays, switches, instrumentation, diagnostic port (OBD). Bodywork And Fairings: Fairing removal and installation, seat, fuel tank, body panel repair and replacement, trim components. Procedures Included Routine Maintenance: Oil changes, filter replacements (oil, air), chain adjustment and lubrication, spark plug replacement, coolant checks, brake fluid checks. Troubleshooting: Diagnostic flowcharts for common issues, error code interpretation, electrical system fault finding, engine performance problems. Major Repairs: Engine rebuilds, gearbox repairs, suspension overhaul, electrical component replacement, brake system overhauls. Special Tools: Identification of necessary specialized tools for specific procedures (e.g., flywheel holding tool, torque wrenches, diagnostic tools). Technical Depth Depth Of Information: Comprehensive, covering from basic routine maintenance to full engine and component rebuilds, including diagnostic procedures and specifications. 📊 Manual Specifications File Format Digital Format Quality: High-resolution PDF with searchable text for efficient information retrieval. Print Quality Print Version Paper Type: Durable, high-quality paper suitable for workshop environments. Clear, sharp printing of diagrams and text. Binding Type Print Version Binding: Spiral-bound or perfect-bound for easy page turning and lay-flat usability in a workshop setting. ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, 4-stroke, DOHC, 8-valve, Parallel-twin (659cc) Performance Horsepower Peak: 100 HP (73.5 kW) @ 11,500 rpm Torque Peak: 67 Nm (49.4 lb-ft) @ 8,500 rpm Fuel System Fuel Delivery: Aprilia brand fuel injection with ride-by-wire throttle control, DOHC. Fuel Type Recommendation: Unleaded gasoline, minimum 91 octane (RON + MON)/2 (or equivalent like 87 AKI in North America). Cooling System Coolant Type: Ethylene glycol-based coolant with corrosion inhibitors. Specific Aprilia P/N or equivalent (e.g., Motul Motocool Expert). Lubrication Engine Oil Type Recommendation: API SG/SH/SJ or higher, JASO MA/MA2 certified synthetic motorcycle oil, 10W-40 viscosity grade (check manual for specific seasonal recommendations). Engine Oil Capacity: Approx. 2.4 Liters (2.5 US qts) without filter change; Approx. 2.6 Liters (2.7 US qts) with filter change. Always verify with dipstick/sight glass. Engine Internals Bore X Stroke: 70 mm x 85.7 mm Compression Ratio: 13.0:1 Valve Timing: Details of intake and exhaust valve opening/closing points, lift, and duration will be in the manual. Timing Chain Tensioner Type: Automatic hydraulic tensioner. 🔧 Transmission Standard Transmission Type: 6-speed constant mesh Optional Quickshifter: Aprilia Quick Shift (AQS) - Upshift and Downshift (standard on many variants, optional on others). Features Clutch Type: Wet multi-plate clutch, mechanically operated with assist and slipper function. Final Drive: O-ring sealed chain, 520 pitch. Gear ratio specified in manual. Lubrication Transmission Oil Type: Specific motorcycle gear oil (e.g., SAE 75W/90 GL-4 or GL-5), capacity specified in manual. 📐 Dimensions Exterior Wheelbase: RS 660: 1370 mm (53.9 in) / Tuono 660: 1390 mm (54.7 in) Seat Height: RS 660: 820 mm (32.3 in) / Tuono 660: 820 mm (32.3 in) Weights Dry Weight: RS 660: Approx. 169 kg (373 lbs) / Tuono 660: Approx. 183 kg (403 lbs) - without battery and oil. Wet Weight: RS 660: Approx. 183 kg (403 lbs) / Tuono 660: Approx. 202 kg (445 lbs) - with all operating fluids....