BMW S 1000 R 2015 vs. Kawasaki Z900 2021

The BMW S 1000 R 2015 and the Kawasaki Z900 2021 are both naked bikes with similar engine types, in-line four-cylinder engines. However, there are several differences between the two models.

In terms of engine power, the BMW S 1000 R 2015 has a higher output with 160 HP compared to the Kawasaki Z900 2021, which has 125.4 HP. This means that the BMW offers more power and acceleration, potentially providing a more thrilling riding experience.

In terms of torque, the BMW S 1000 R 2015 also has an advantage with 112 Nm compared to the Kawasaki Z900 2021's 98.6 Nm. This additional torque can result in better low-end power and acceleration.

Both bikes have four cylinders and a displacement of around 1000cc, providing a good balance between power and efficiency.

BMW S 1000 R 2015

In terms of suspension, both bikes feature upside-down telescopic forks at the front and a swing arm with a monoshock at the rear. This setup allows for a smooth and controlled ride, absorbing bumps and providing stability.

The chassis of the BMW S 1000 R 2015 is made of aluminum and has a twin-tube frame, which offers a good balance between rigidity and weight. On the other hand, the Kawasaki Z900 2021 has a steel frame with a double cradle design, which may provide a slightly different feel and handling characteristics.

Both bikes have double disc brakes at the front with four-piston calipers, providing strong and reliable stopping power. However, the BMW S 1000 R 2015 uses radial technology, which can offer improved braking performance and feel compared to the petal technology used in the Kawasaki Z900 2021.

In terms of advanced rider assistance systems, the BMW S 1000 R 2015 offers dynamic suspension, which can automatically adjust the suspension settings based on the riding conditions. On the other hand, the Kawasaki Z900 2021 offers a range of advanced systems including ABS, riding modes, ride by wire, and traction control. These systems can enhance safety and provide a customizable riding experience.

Kawasaki Z900 2021

In terms of dimensions and weights, both bikes have similar front and rear tire widths and diameters, providing good grip and stability. The BMW S 1000 R 2015 has a slightly shorter wheelbase at 1439 mm compared to the Kawasaki Z900 2021's 1450 mm. The seat height of the BMW is also slightly higher at 814 mm compared to the Kawasaki's 795 mm. The kerb weight of the BMW S 1000 R 2015 is 207 kg with ABS, while the Kawasaki Z900 2021 weighs slightly more at 210 kg.

In terms of strengths, the BMW S 1000 R 2015 is praised for its powerful and well-controllable engine, powerful braking system, and comparatively comfortable seating position. On the other hand, the Kawasaki Z900 2021 is commended for its powerful four-cylinder engine, intuitive handling, good equipment, aggressive looks, and value for money.

In terms of weaknesses, the BMW S 1000 R 2015 is criticized for its expensive optional extras, hard chassis, and vibrations in the handlebars. On the other hand, the Kawasaki Z900 2021 is noted for not having a quickshifter option and being behind competitors with 6-axis IMU electronics.

Overall, both the BMW S 1000 R 2015 and the Kawasaki Z900 2021 have their own strengths and weaknesses. The BMW offers more power and a comfortable seating position, while the Kawasaki provides good value for money and a range of advanced rider assistance systems. Ultimately, the choice between the two will depend on the rider's preferences and priorities.