Cotton/Blackbourne 490cc – National Motorcycle Museum

Cotton/Blackbourne 490cc - National Motorcycle Museum

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In 1922 Stanley Woods rode a Blackburne-engined Cotton to fifth in the 350 cc Junior TT,[2] and the following year, won the 1923 Isle of Man TT, averaging 55.73 miles per hour (89.69 km/h), bettering Douglas rider, Manxman Tom Sheard’s winning 500 cc Senior TT time, an average of 53.15 miles per hour (85.54 km/h). Cotton motorcycles took a second and third in the Ultra Lightweight TT, and a second in the Lightweight TT. They only managed a second place in the 1925 Junior TT, but in the 1926 races, swept the field taking the first three places in the Lightweight TT. These victories helped establish Cotton as a race-winning machine, with exceptional handling for its time. The 1923 win, and consequent full order book, enabled a move to new premises, the Vulcan Works in Quay Street. In 1927 the frame dimensions were altered.

Engine – 490cc single ohc engine. Amal carburettor.
Compression ratio – 7.23 to 1
Power – 29bhp@5,500rpm
Transmission – 4 speed change gearbox
Tyres – 3" x 21" front / 20" x 3.50 rear
Weight – 390lbs
Top speed – not known
Price new – £269.16s.8d.

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Posted by Digidiverdave on 2012-01-17 10:26:49

Tagged: , veteran , vintage , motors , historic , Classic Bike , David Henshaw , Motorcycle , National Motorcycle Museum

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