Aprilia’s RS 660 represents the cutting edge of the new generation of middleweight sportbikes, where more accessible performance has replaced the razor-edge/maximum commitment speed of the old 600 supersport machines. Don’t misinterpret that to mean that the Aprilia is some fat and lazy motorcycle; with its 649cc 270-degree parallel-twin engine pumping out 100 hp at 10,500 rpm and 49.4 lb.-ft. of torque at 8,500 rpm propelling a bike weighing just 403 pounds fully gased, the RS 660 has plenty of excitement on tap. It just doesn’t require expert-level hands to extract it, nor a horse jockey’s flexibility to ride it, with ergonomics that are much more palatable for everyday street use. - CycleWorld.com
Aprilia parallel twin-cylinder forward facing, 4-stroke, liquid cooled with wateroil radiator and heat exchanger, double overhead camshafts (DOHC) with a silent chain on the right side, four valves per cylinder
81 mm
63.93 mm
659 cc
13.5:1
100 hp (73.5 kW) at 10500 rpm
67.0 Nm (6.83 kg) at 8500 rpm
Airbox with front dynamic air intakes, two Ø48-mm throttle bodies, Ride-byWire engine management
Electric
Wet sump
6 gears with Aprilia Quick Shift (AQS) up and down
Multi-plate wet clutch with mechanical slip system
Chain, with drive ratio: 17/43
Aluminium dual beam chassis with removable seat support subframe
Kayaba 41-mm stanchion fork, aluminium radial calliper mounting bracket. Adjustable spring preload and rebound damping
Aluminium asymmetric swingarm. Adjustable monoshock in spring reload, rebound braking
Front ABS: double disc, diameter 320 mm Brembo radial callipers with four Ø32-mm opposing pistons. Radial pump and metal braided brake hose.
Rear: Ø220-mm disc; Brembo calliper with two Ø34-mm separate pistons. Pump with integrated tank and metal braided hose Multimap ABS Cornering