In the beginning, it was just the Benelli Garage, which repaired bicycles and motorcycles, but was already able to produce all of the spare parts needed for repairs. During World War I, Benelli worked hard fixing parts for the Italian machines in war and in 1919 the first motorcycle was presented to the public. In 1920 the company built its first complete engine in-house, a single-cylinder two-stroke 75 cc model, immediately adapted to a bicycle frame. A year later in 1921, Benelli built its first motorcycle, using their own engine which had by then become a 98 cc model.