| General |
| Comments | - | Small windscreen. Drive Mode Selector. |
| Year | 2021 | - |
| Colours | - | Glass Blaze Orange/Glass Sparkle Black, Glass Matte Mechanical Gray/Pearl Brilliant White |
| Make Model | Aprilia RS 660 | - |
| Warranty | - | 12 month unlimited mileage limited warranty. |
| Dimensions |
| Ground Clearance (mm) | - | 130 mm |
| Ground Clearance (in.) | - | 5.1 inches |
| Seat Height | 815 mm / 32.0 in | 810 mm / 31.9 in. |
| Wheelbase | 1370 mm / 53.9 in | 1390 mm / 54.7 in. |
| Height | - | 1135 mm / 44.7 in. |
| Length | - | 2030 mm / 79.9 in. |
| Width | - | 710 mm / 28.0 in. |
| Weights & Capacities |
| Oil Capacity (Quarts) | - | 3.59 US quarts |
| Oil Capacity (l) | - | 3.40 litres |
| Dry Weight | 169 kg / 372.5 lbs | - |
| Fuel Capacity | 15 Litres / 3.9 US gal | 17.00 litres / 4.49 US gallons |
| Wet Weight | 183 kg / 403.4 lbs | 190.0 kg / 418.9 lbs |
| Performance |
| Max Power | 100 hp / 73.5 kW @ 10,500 rpm | - |
| Max Torque | 67.0 Nm / 6.83 kgm @ 8,500 rpm | 86.2 Nm (8.8 kgf-m or 63.6 ft.lbs) @ 11200 Revolutions" |
| Engine |
| Displacement (cc) | - | 750.0 cc |
| Displacement (ci) | - | 45.77 cubic inches |
| Engine Type | - | In-line four, four-stroke |
| Fuel Control | - | Double Overhead Cams/Twin Cam (DOHC) |
| Bore x Stroke (in,) | - | 2.8 x 1.9 inches |
| Bore x Stroke (mm) | - | 70.0 x 48.7 mm |
| Displacement | 659 cc / 40.2 cu-in | - |
| Engine Detail | Four stroke, forward facing parallel twin, DOHC with silent chain drive on the right side, four valves per cylinder | Titanium alloy valves |
| Fuel System | - | Injection. Suzuki Dual Throttle Valve fuel injection |
| Bore x Stroke | 81 x 63.93 mm | - |
| Compression Ratio | 13.5: 1 | 12.5:1 |
| Cooling System | Liquid cooled with radiator and water-oil heat exchanger | - |
| Emissions | Euro 5 CO2 emissions - 116 g /km | - |
| Engine Lubrication | - | Wet sump |
| Exhaust | Akrapovič - for race use only | - |
| Fuel Induction | Airbox with front air intake. 2 ∅48 mm throttle bodies, Ride-By-Wire management | - |
| Idle Speed | - | 1000-1200 RPM |
| Ignition | - | Transistorized |
| Lubrication | Wet sump | - |
| Spark Plug | - | NGK CR9EIA-9, DENSO IU27D |
| Starter | Electric | Electric |
| Valve System | - | 4 |
| Drivetrain |
| Chain Size | - | 525 |
| Clutch | Wet, multi-plate, slipper | Wet, multi-plate |
| Final Drive | Chain, with drive ratio: 17/43 | Chain (final drive) |
| Gearbox | - | 6-speed |
| Number of Chain Links | - | 116 |
| Primary Drive | - | Constant mesh |
| Sprocket | - | 15/43 (front/rear) |
| Transmission / Drive | 6 Speed, AQS Aprilia Quick Shift | - |
| Chassis |
| Fork Tube Size (mm) | - | 41 mm |
| Fork Tube Size (in.) | - | 1.6 inches |
| Frame Type | Double beam aluminium frame with detachable rear seat | Twin-spar aluminum cradle |
| Suspension - Front | Kayaba upside down fork ∅ 41 mm with counter spring, aluminium feet for fixing radial calipers. Adjustable for rebound, compression and spring preload. | Inverted telescopic, coil spring, oil damped |
| Suspension - Rear | Aluminium swingarm with asymmetrical trusses. Monoshock with adjustable counter spring: rebound and spring preload. | Link type, single shock, coil spring, oil damped |
| Rake | 24.1° | - |
| Trail | 104.6 mm | - |
| Wheel Travel - Front | 120 mm / 4.7 in | 120 mm / 4.7 in. |
| Wheel Travel - Rear | 130 mm / 5.1 in | 130 mm / 5.1 in. |
| Electronics |
| Electronics Package | 6-axis inertial platform, APRC suite which includes ATC (traction control, AWC (wheelie control), AEB (engine brake), AEM (engine map), ACC (cruise control) 5 Riding modes - (Road and Track, 3 fixed and 2 customizable) | - |
| Electrical Systems |
| Instrumentation | - | Analog tachometer and LCD panel with speed, odometer, dual trip meter, reserve trip meter, clock, coolant temperature/oil pressure indicator, S-DMS, and gear position indicators |
| Lighting system | - | Vertically stacked high- and low-beam 65W halogen bulbs |
| Wheels & Brakes |
| Brakes - Front | 2x 320mm Brembo radial calipers with 4 32mm opposing pistons. Radial pump and metal braided brake hose | Double disc. Brembo 4-piston. |
| Brakes - Rear | Single 220mm disc; Brembo calliper with 2 isolated ∅ 34mm pistons. Pump with integrated tank and metal braided hos | Single disc. Nissin-1 piston. |
| ABS | ABS Cornering multimap | - |
| Brake Fluid Type | - | DOT 4 |
| Tyre Pressure - Front | - | 33 PSI (2.3 Bar or 230 kPa) |
| Tyre Pressure - Rear | - | 36 PSI (2.5 Bar or 250 kPa) |
| Tyres - Front | 120/70 ZR 17 Tubeless radials | 120/70-ZR17 |
| Tyres - Rear | 180/55 ZR 17 (alternatively 180/60 ZR17) Tubeless radials | - |
| Wheels - Front | In aluminium alloy 3.5 x17 | - |
| Wheels - Rear | In aluminium alloy 5.5 x17 | - |