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 key differences in terms of specifications and features.

Starting with the engine and drivetrain, both models have an inline 2-cylinder engine with liquid cooling. However, the BMW F 800 R 2017 has a displacement of 798cc, while the BMW F 900 R 2021 has a larger displacement of 895cc. This results in a higher power output for the F 900 R, with 105 horsepower compared to the F 800 R's 90 horsepower. The F 900 R also has a higher torque rating of 92 Nm, compared to the F 800 R's 86 Nm. Both models have fuel injection systems for efficient fuel delivery.

In terms of suspension, both bikes feature a telescopic fork at the front and a swingarm suspension at the rear. The chassis of the F 800 R 2017 is made of aluminum, while the F 900 R 2021 has a steel frame. This could potentially affect the weight and handling characteristics of the two models.

BMW F 800 R 2017

Both bikes have dual disc brakes at the front with four-piston calipers, providing strong braking performance. They also feature radial technology for improved braking efficiency. In terms of assistance systems, the F 800 R 2017 has electronically adjustable suspension, while the F 900 R 2021 is equipped with ABS, traction control, and different riding modes.

In terms of dimensions, both models have the same tire widths and diameters, with a front tire width of 120mm and a rear tire width of 180mm, both with a 17-inch diameter. The F 800 R 2017 has a slightly longer wheelbase of 1520mm, compared to the F 900 R 2021's 1518mm. The seat height of the F 800 R can be adjusted between 790mm and 820mm, while the F 900 R has a fixed seat height of 815mm. Both models have a fuel tank capacity of 15 liters for the F 800 R and 13 liters for the F 900 R.

BMW F 900 R 2021

In terms of strengths, the F 800 R 2017 is praised for its strong brakes, improved equipment, low weight, accessible geometry, and characteristic sound. On the other hand, the F 900 R 2021 is praised for its excellent cockpit and functional connectivity, extensive electronics that can be operated logically, easy and casual handling, smooth and reserved yet wild and sporty performance, pleasant seating position, wide range of equipment and configuration options, and versatile suspension.

As for weaknesses, the F 800 R 2017 is criticized for being somewhat pragmatic and lacking a bit of excitement. The F 900 R 2021 is noted to have a slightly stiff gear lever, rough engine performance at high revs, and inadequate splash protection at the rear.

Overall, the BMW F 900 R 2021 offers several improvements over the F 800 R 2017, including a more powerful engine, advanced electronics, and enhanced handling characteristics. However, it's important to consider personal preferences and priorities when choosing between the two models.