Werner motor cycle, 1899. This originates from the 1897 design by MM. Werner Freres of Paris and is regarded as probably the first practical motorcycle after various complicated designs to motorize tricycles and bicycles. The engine is attached to the steering head and the petrol tank to the top frame; it is lightweight with a smoother drive due to the belt drive, however it was a little unstable due to its high centre of gravity. This Werner was still being ridden fifty years later through the Second World War and still has the petrol ration book from 1949.
Courtesy Science Museum Group. Licence: CC BY-NC-ND 4.0

More information UK Museums
History of Werner Motorcycles