BMW introduced an inline six-cylinder café racer concept at the 2009 EICMA show in Milan, Italy.
Inline-six engines have a staple in BMW’s automobiles for decades and the German manufacturer’s motorcycle division took on the challenge of adapting the straight-six to a bike without making it too long or too wide. The result is the BMW Motorrad Concept 6, and an evolution BMW says “will further expand the K-Series in the foreseeable future”.