The BMW K1 generated some controversial discussions in 1988 without any parallel in BMW's past. Apart from numerous technical highlights, the trigger for this heated debate was the aerodynamically refined "body" ("Karosserie") concept with the motorcycle faired almost entirely from the front wheel to the tail with a pillion seat cover and a design that permitted a uniquely low drag coefficient (cW) of 0.36 - 0.38. This enabled the BMW K1 to achieve a top speed of more than 240 km/h, which ranked it as the fastest 100 hp series motorcycle of its time.