Excelsior Motor Manufacturing & Supply Company

Excelsior Motor Manufacturing & Supply Company was a U.S. motorcycle manufacturer operating in Chicago from 1907 to 1931. It was purchased by Ignaz Schwinn, proprietor of bicycle manufacturer Arnold, Schwinn & Co. in 1912. In 1912, an Excelsior was the first motorcycle to be officially timed at a speed of 100 mph. The Henderson Motorcycle Company became a division of Excelsior when Schwinn purchased Henderson in 1917. By 1928, Excelsior was in third place in the U.S. motorcycle market behind Indian and Harley-Davidson. The Great Depression convinced Schwinn to order Excelsior's operations to cease in September 1931.

The mainstay of Excelsior production through the 1910s and into the 1920s was the 61 cubic inches (1,000 cubic centimetres) Model BigX. This had an inlet-over-exhaust v-twin engine, firstly with belt drive then with 2 speed and then 3 speed gearbox. Colors were grey with red panels in the early teens, the 'Military Model' of the late teens was in khaki (a green-brown shade) and 1920s models were in a very dark blue with fine gold pinstriping. Production was in limited quantities compared to the giant Indian Motocycle Company, and many were exported - Europe and Australia receiving a number of shipments. A very small amount of BigX motorcycles were manufactured with 74 cubic inches (1,210 cubic centimetres) engines in the 1920s. Production of the BigX continued until 1924, after which it was replaced by the SuperX.

Excelsior released its Super X model in 1925. The Super X was America's first motorcycle with a 45 cu in (737 cc) V-twin engine. It was conceived as a competitor to the smaller Indian Scout. In response to the Super X's popularity, Indian first raised the Scout's capacity to 45 cubic inches (737 cc) and then introduced the new Indian 101 Scout, while Harley-Davidson introduced their 45 cu in (737 cc) motorcycle, the Model D.

...
Wikipedia