BMW F 800 R 2017 vs. BMW F 900 R 2021

The BMW F 800 R model year 2017 and the BMW F 900 R model year 2021 are both naked bikes from BMW, but they have some notable differences in terms of technical specifications and strengths.

In terms of engine and drive train, both models have an in-line engine with two cylinders and liquid cooling. However, the BMW F 800 R has an engine power of 90 HP and torque of 86 Nm, while the BMW F 900 R has a higher engine power of 105 HP and torque of 92 Nm. This indicates that the F 900 R has a more powerful engine, providing better acceleration and performance.

Both models have a fuel injection system and a swing arm suspension at the rear. The front suspension is an upside-down telescopic fork for both models. However, the BMW F 900 R has some additional advanced rider assistance systems, including ABS, anti-slipping control, and riding modes. This enhances the safety and control of the F 900 R.

BMW F 800 R 2017

In terms of chassis, the BMW F 800 R has an aluminum frame, while the BMW F 900 R has a steel frame. The frame type for both models is a twin tube, load-bearing engine, providing stability and durability.

Both models have double disk brakes with four pistons at the front, using radial technology. This ensures strong braking performance for both models.

In terms of dimensions and weights, the front and rear tire widths and diameters are the same for both models. However, the wheelbase of the BMW F 900 R is slightly shorter at 1518 mm compared to the 1520 mm of the F 800 R. The seat height of the F 900 R is higher at 815 mm compared to the variable seat height options of the F 800 R (790-820 mm). The fuel tank capacity of the F 800 R is larger at 15 liters compared to the 13 liters of the F 900 R.

BMW F 900 R 2021

Now, let's compare the strengths and weaknesses of each model. The BMW F 800 R 2017 is praised for its strong brakes, upgraded equipment, low weight, accessible geometry, and characteristic sound. However, it is noted to be somewhat pragmatic and lacking in effervescence.

On the other hand, the BMW F 900 R 2021 has a great cockpit and functional connectivity, extensive electronics that can be operated logically, and a very accessible but still casual handling. It is described as a motorcycle that can ride bland and reserved but also become wild and sporty when needed. The seating position is pleasant, and there is a wide choice of equipment and configuration options. The suspension allows for a wide range of use, providing both comfort and direct, precise handling. However, it is mentioned that the gearstick can be a little stiff, both with and without the quickshifter, and the engine runs a little rough and lacks elegance at the top. Additionally, the rear splash guard is said to be poor.

In conclusion, the BMW F 900 R 2021 offers several improvements over the BMW F 800 R 2017, including a more powerful engine, advanced rider assistance systems, and a wider range of equipment options. However, it does have some minor weaknesses in terms of gearshift stiffness, engine refinement, and rear splash guard.