Aprilia RS 660 2021 vs. Kawasaki Ninja 650 2017

The Aprilia RS 660 2021 and the Kawasaki Ninja 650 2017 are both supersport motorcycles that offer powerful performance and sporty aesthetics. However, there are several key differences between the two models.

In terms of the engine and drivetrain, the Aprilia RS 660 2021 features an inline crankshaft configuration, while the Kawasaki Ninja 650 2017 has an inline engine. The RS 660 has a bore of 81 mm and a stroke of 63.93 mm, resulting in a displacement of 659cc. It delivers a power output of 100 HP and a torque of 67 Nm, with a compression ratio of 13.5. On the other hand, the Ninja 650 has a bore of 83 mm and a stroke of 60 mm, resulting in a displacement of 649cc. It delivers a power output of 68.2 HP and a torque of 65.7 Nm, with a compression ratio of 10.8. Overall, the RS 660 offers more power and torque compared to the Ninja 650.

In terms of suspension, both motorcycles feature a telescopic front fork and a rear swingarm. However, the RS 660 offers more adjustability with preload and rebound adjustment, while the Ninja 650 only has preload adjustment. This allows riders to fine-tune the suspension settings to their preference and riding style.

In terms of chassis, the RS 660 features an aluminum frame with a rake of 65.9 degrees and a trail of 104.6 mm. On the other hand, the Ninja 650 features a steel frame with a rake of 65.5 degrees and a trail of 100 mm. The aluminum frame of the RS 660 provides a lighter and more rigid structure, contributing to better handling and maneuverability.

Aprilia RS 660 2021

Both motorcycles are equipped with dual disc front brakes, but the RS 660 has larger 320 mm discs compared to the Ninja 650's 300 mm discs. The RS 660 also features radial brake technology, which provides improved braking performance and feel. The Ninja 650, on the other hand, features petal brake technology, which also offers good braking performance.

In terms of advanced rider assistance systems, the RS 660 comes with a comprehensive package including ABS, riding modes, launch control, ride-by-wire, quick shifter, traction control, and anti-wheelie control. On the other hand, the Ninja 650 only comes with ABS.

In terms of dimensions and weights, both motorcycles have similar front and rear tire widths of 120 mm and 17-inch diameter. However, the RS 660 has a wider rear tire at 180 mm compared to the Ninja 650's 160 mm. The RS 660 also has a shorter wheelbase of 1370 mm compared to the Ninja 650's 1410 mm. The seat height of the RS 660 is slightly higher at 820 mm compared to the Ninja 650's 790 mm. The RS 660 is also lighter with a curb weight of 183 kg compared to the Ninja 650's 193 kg.

Kawasaki Ninja 650 2017

In terms of aesthetics, the RS 660 has a sportier and more aggressive look, while the Ninja 650 has a sleek and elegant design reminiscent of the ZX-10R.

In terms of strengths, the RS 660 offers a powerful engine, a comprehensive electronic package, a sporty chassis, a pleasant sound, a reduced weight, and a sporty appearance. On the other hand, the Ninja 650 boasts a transparent chassis for sport riding, playful and fun handling, excellent brakes, an elegant ZX-10R-like appearance, and a durable engine.

However, the RS 660 has a weakness in its less legible tachometer, while the Ninja 650 has a weakness in its lack of sound from the stock exhaust and slight engine vibrations.

Overall, the Aprilia RS 660 2021 and the Kawasaki Ninja 650 2017 are both capable supersport motorcycles with their own unique strengths and weaknesses. The RS 660 offers more power, advanced electronics, and a sportier design, while the Ninja 650 provides a fun and playful riding experience with an elegant appearance.