At a quick overview of two-wheel electric units, their division into three groups catches the eye immediately. Although, they are distinguished not only technically, but also ideologically.
Long ago, humankind seriously engaged in the production of the unusual motorcycles, which possessed a unique construction, had unusual separate assemblies or systems, as well as highly dynamic rates and impressive power.
The first motorcycles appeared in the 19th century: a small steam engine was attached to the bicycle frame. However, motorcycles in understanding started to appear at the beginning of the 20th century. Just then, the first Harley-Davidson, Triumph, Benelli, BMW motorcycles and many others were created. Back at that time, the initial division into different types began.