Aprilia RS660

Aprilia RS660
	2026 Aprilia RS 660
Manufacturer	Aprilia
Parent company	Piaggio
Production	2020–present
Engine	659 cc (40.2 cu in) liquid-cooled 4-stroke parallel-twin
Bore / stroke	81 mm × 63.93 mm (3.189 in × 2.517 in)
Compression ratio	13.5:1
Power	100 hp (75 kW) @ 10,500 rpm
Torque	67 N⋅m (49 lb⋅ft) @ 8,500 rpm
Ignition type	Capacitor discharge electronic ignition (CDI)
Suspension	Front; Hydraulic telescopic fork
Brakes	Front; Ø 320 mm double disc; Rear; Ø 220 mm single disc
Tires	Front; 120/70 R17; Rear; 180/55 ZR 17
Wheelbase	53.9 in (1,370 mm)
Weight	373 lb (169 kg) (dry); 403 lb (183 kg) (wet)
Fuel capacity	15 L (3.3 imp gal; 4.0 US gal)
Related	Aprilia RS457

The Aprilia RS660 is a sport bike designed and produced by Italian manufacturer Aprilia since 2020. Created as a mid-size contender for racing championships, it has two road legal models being the RS 660 and the RS 660 Factory. There is also a track only variant, the RS 660 Trofeo.

The engine, a 659 cm³ twin-cylinder with a double overhead camshaft and connecting rod pins at 270°, is capable of delivering 98 peak horse power at 10500 rpm and 67 Nm of torque at 8500 rpm. The frame is an aluminum double beam contributing to a total weight of 169 kg dry. The shock absorbers are adjustable with 41 mm upside-down Kayaba front forks. Electronics are the dedicated Marelli APRC sports system, which gives five performance settings, eight-level traction control, anti-wheelie, ABS, three levels of engine braking, and ride-by-wire throttle control.

In 2025, a new engine was introduced that increased the power output to 105 Hp and added some extra features to the electronics package. These included an extra rider profile, and Aprilia launch control (ALC).

History

In 2019 Aprilia displayed two sports prototypes, the RS 660 and the Tuono 660, at the 2019 EICMA show. The two were intended to fill a void in the range from the Noale manufacturer, to be able to compete with Japanese companies in the medium-displacement motorcycle sector. Designed as a smaller version of the new RSV4 1100, it shares its lines and chassis, the result of a project born in Piaggio Group Style Center.

In the spring of 2022, the factory version was introduced, which brought a technical update.

The machine finished second in the UK National Sportbike Championship, a new race series for 2024.

Aprilia RS660 Extrema

At the end of the year, a version called RS 660 Extrema was introduced, with modifications to the chassis for track use and lightening of some parts, reducing the weight to 166 kg.

Aprilia RS660 Trofeo

A race-only (non-street-legal) version called the RS660 Trofeo was introduced in 2023, featuring updated electronics, fiberglass race bodywork, adjustable rearsets, a race top triple clamp, clip-ons and a full titanium SC-Project exhaust system. Reported power output was 105 hp and reported dry weight was 153 kg (337.3 lb).