Kawasaki Ninja ZX-4RR versus Aprilia RS 660

Kawasaki Ninja ZX-4RR

Supersport

Aprilia RS 660

Supersport

Test ride on the Kawasaki ZX-4RR during the Kawasaki roadshow in Augustfehn in April 2025. You want to test ride the Kawasaki ZX-4RR yourself? Look here .... weiter

Kawasaki ZX-4RR

Gallery

Beautiful sports machine from Italy - are 48 hp enough?

The Aprilia RS 660 belongs to an almost extinct species: Super Sports car with 600 cc. There are hardly any competitors, so alone it is worth taking a look at the beauty from Italy. We have the RS 660 in the A2 variant with... weiter

Aprilia RS 660 mit 48 PS im Test

Gallery

Year of construction / RRP / Test report

Built von 2024 bis 2025~

Built von 2021 bis 2025~

RRP 9.595 €

RRP 11.599 €

Ausführliches Test-Video von Motorradtest.de

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Competitors

Pros:

Optics
Sound
Handling
Brake

Pros:

compact, lightweight, manoeuvrable
Fully equipped electronically
V2 sound
sporty seating position, yet suitable for everyday use
good chassis

Cons:

Not much going on down below
Pillion - let it be

Cons:

Rear brake with long control interval
48 hp version thin on top
slightly too small displays in the TFT display

Dimensions & Weight

Wheelbase: 1.380 mm
Length : 1.990 mm Height : 1.110 mm
Seat : 800 mm
Weight : 189 kg

Wheelbase: 1.370 mm
Length : 1.995 mm
Seat : 820 mm
Weight : 183 kg

Engine

Motor design: Four-stroke in-line four-cylinder 4 Cylinder
Displacement: 399 ccm
Hub: 39 mm
Hole: 57 mm
Cooling: flüssig
Drive: O-Ring Kette
Aisles: 6

Motor design: Four-stroke series with 270 degree lifting pin offset 2 Cylinder
Displacement: 659 ccm
Hub: 64 mm
Hole: 81 mm
Cooling: flüssig
Drive: Kette
Aisles: 6

Performance

Performance: 77 HP at 14.500 U/Min
Torque: 39 NM bei 13.000 U/Min

Tank contents: 15 Litre
Consumption: 5 l
Reach: 333 km

Performance: 100 HP at 10.500 U/Min
Torque: 67 NM bei 8.500 U/Min

Tank contents: 15 Litre
Consumption: 5 l
Reach: 306 km

Chassis

Frame type:
Tubular space frame (steel)

Front suspension:
37mm upside-down cable (Showa SFF-BP) with adjustable spring base and top-out springs (120mm travel )

Rear suspension:
Horizontal back-link gas-filled shock absorber (Showa-BFRC-Lite) with adjustable rebound and compression damping as well as adjustable spring base and top-out springs (travel 124 mm)
Rear suspension:
Two-arm swingarm

Tyres at the front: 120/70ZR17M/C (58W)
Rear tyres: 160/60ZR17M/C (69W)

Frame type:
Bridge frame, motor supporting element (aluminium)

Front suspension:
Kayaba USD 41 mm (travel 120 mm)

Rear suspension:
Mono strut (travel 130 mm)
Rear suspension:
Aluminum two-arm swingarm

Tyres at the front: 120/70 ZR 17
Rear tyres: 180/55-ZR17

Brakes

Front brake
Semi-floating 290 mm dual brake discs, radially mounted four-piston calipers (∅ 290 mm) Rear brake
Single disc brake with double-piston caliper (∅ 220 mm)

Front brake
Double disc, Brembo four-piston fixed caliper, radially bolted (∅ 320 mm) Rear brake
Single disc, Brembo two-piston floating caliper (∅ 220 mm)

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Conclusion - what sticks

The Aprilia RS 660 delivers what it promises: it is a racy super sports car and drives itself that way. What A2 license holders probably don't want to hear now: 100 hp fit this type of machine much better than 48 hp. Especially in the upper speed ranges, too little happens with the A2 machine - but only those who have already driven 100 hp or more will notice this. In this respect, the A2 bikers will probably miss little, because they just don't know it any other way.

The RS660 is a lot of fun on country roads and every owner will be able to enjoy the really super-complete equipment. The test machine was kindly provided to us by ZTS (Zweiradtechnik Schielmann in Bokel). There she stands as a demonstrator and is looking forward to test drives!