For the BMW HP2 and Roadster of the engine cylinder head is shown on the left and right, sure this bike will use a flat twin engine type or so-called Boxer type, well BMW does have a strong history of this same type of machine, In 1921 they were already memperoduksi M2B15 Boxer engines and motors embedded in helios year after making the machine, well for the final energy distribution, when viewed from the pictures that made motorevue seem to choose the type of axle for BMW HP2 Roadster Boxer, this Motorcycle adventurous little like RG series.