c.1920 Excelsior 1,000cc 20R Motorcycle & Sidecar, Registration no. not UK registered Frame no. None Visible Engine no. 2734

Important Collectors' Motorcycles and Spares
c.1920 Excelsior 1,000cc 20R Motorcycle & Sidecar
Registration no. not UK registered
Frame no. None Visible
Engine no. 2734
• Iconic American make
• Part of a private collection
• Offered in need of re-commissioning/restoration

The famous American Excelsior motorcycle was produced by the Excelsior Motor Manufacturing Company of Chicago, Illinois from 1907 until 1931, latterly under the 'Super-X' brand name. The first Excelsior was a belt-driven single cylinder machine, the engine of which formed part of the frame. The engine itself was an inlet-over-exhaust 'F-head', a design then much in vogue because, whatever its limitations, it enabled the exhaust valve to be directly cooled by the incoming mixture, a positive advantage at a time when the science of metallurgy was in its infancy. 1911 was a landmark year in Excelsior's history, for the firm was acquired by bicycle maker Ignaz Schwinn and introduced its first v-twin model that year. In 1913 the 61ci (1,000cc) twin was offered with all-chain drive, while two-speed planetary transmission and a leaf-sprung, Indian-style front fork were two innovations introduced for the following season. By this time the original Excelsior single had been dropped, being replaced for 1914 by a 250cc two-stroke lightweight.

Alongside rivals Harley-Davidson and Indian, Excelsior offered a three-speed countershaft transmission for 1915, at the same time introducing a new frame with curved top tube and smoothly rounded tank, a first for Excelsior. Deeply valanced mudguards distinguished the v-twin of 1917. 'Military' olive green was adopted as the Excelsior livery that year and would remain the only option until 1920 when Navy Blue became the norm. In 1921 a 74ci (1,200cc) v-twin was added to the range, but by this time Excelsior had acquired the manufacturing rights to the Henderson Four and the days of the big v-twins were numbered. They were gone by 1925, Excelsior preferring to concentrate its resources on the Four and the newly introduced Super-X 45ci (750cc) v-twin.

Offered from a private collection, this Excelsior motorcycle combination will require re-commissioning or more extensive restoration before returning to the road. The engine turns over (with compression), while the sidecar appears structurally sound and the brown leather interior in good order. Prospective purchasers should satisfy themselves with regard to this motorcycle's originality, correctness, and mechanical condition prior to bidding. There are no documents with this Lot, which is sold strictly as viewed.