Aprilia RS 660 2021 vs. Kawasaki Ninja 400 2023

The Aprilia RS 660 2021 and the Kawasaki Ninja 400 2023 are both supersport motorcycles that offer different features and specifications.

Starting with the engine and drivetrain, the Aprilia RS 660 2021 is equipped with an inline crankshaft engine with a displacement of 659cc. It has a power output of 100 HP and a torque of 67 Nm. The engine has a high compression ratio of 13.5 and features 2 cylinders with 4 valves per cylinder. On the other hand, the Kawasaki Ninja 400 2023 also has an inline engine, but with a smaller displacement of 399cc. It has a power output of 45 HP and a torque of 37 Nm. The engine has a lower compression ratio of 11.5 and also features 2 cylinders with 4 valves per cylinder.

In terms of suspension, both motorcycles have a telescopic front suspension and a swingarm rear suspension with a monoshock. However, the Aprilia RS 660 2021 offers adjustable preload and rebound, while the Kawasaki Ninja 400 2023 only offers adjustable preload.

Aprilia RS 660 2021

When it comes to the chassis, the Aprilia RS 660 2021 has an aluminum frame with a rake of 65.9 degrees and a trail of 104.6 mm. On the other hand, the Kawasaki Ninja 400 2023 has a steel frame with a rake of 63 degrees and a trail of 92 mm.

In terms of braking, the Aprilia RS 660 2021 is equipped with dual discs at the front with a diameter of 320 mm and radial technology. The Kawasaki Ninja 400 2023, on the other hand, has a single disc at the front with a diameter of 310 mm and petal technology.

Both motorcycles offer advanced rider assistance systems, with the Aprilia RS 660 2021 featuring ABS, riding modes, launch control, ride-by-wire, quick shift, traction control, and anti-wheelie. The Kawasaki Ninja 400 2023, on the other hand, only offers ABS.

In terms of dimensions and weight, both motorcycles have similar tire sizes, with the Aprilia RS 660 2021 having a front tire width of 120 mm and a rear tire width of 180 mm, while the Kawasaki Ninja 400 2023 has a front tire width of 110 mm and a rear tire width of 150 mm. Both motorcycles have a wheel diameter of 17 inches. They also have the same wheelbase of 1370 mm. However, the Aprilia RS 660 2021 has a higher seat height of 820 mm compared to the Kawasaki Ninja 400 2023's seat height of 785 mm. In terms of weight, the Aprilia RS 660 2021 weighs 183 kg with ABS, while the Kawasaki Ninja 400 2023 weighs 168 kg with ABS.

Kawasaki Ninja 400 2023

In terms of strengths, the Aprilia RS 660 2021 offers a powerful engine, a comprehensive electronic package, a sporty chassis, a pleasant sound, reduced weight, and a sporty appearance. On the other hand, the Kawasaki Ninja 400 2023 offers a good combination of stability and playful handling, a robust and reliable appearance, a manageable engine, a wide range of usable revs, and a comfortable seating position.

However, the Aprilia RS 660 2021 has a weakness in its less legible tachometer, while the Kawasaki Ninja 400 2023 has a limitation in terms of space for taller riders.

In conclusion, the Aprilia RS 660 2021 and the Kawasaki Ninja 400 2023 are both capable supersport motorcycles with their own strengths and weaknesses. The Aprilia RS 660 2021 offers a more powerful engine and a more advanced electronic package, while the Kawasaki Ninja 400 2023 provides a more manageable engine and a comfortable seating position. Ultimately, the choice between the two would depend on the rider's preferences and priorities.