Friday, August 13, 2021

The first Triumph parallel twin

The Triumph 6/1 was a 650cc 360 degree twin introduced in 1933. Designed by Val Page, it was intended as a sidecar hauler and it performed quite well, It was not a sales hit suffering for being introduced in the depths of the depression and was discontinued in 1936 when the motorcycle side of Triumph was sold to Jack Sangster. In 1938 the new designer at Triumph, Edward Turner, drew up a new version, the Speed Twin which became THE Triumph twin. Not the best section drawing... the most important detail, the crankshaft, isn't shown!


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