Triumph 6/1

The Triumph 6/1 was a motorcycle made by Triumph at its Coventry factory from 1934 to 1936. Designed by Val Page, it was the first Triumph motorcycle to use a parallel-twin engine. A sidecar-equipped 6/1 won a silver medal in the 1933 International Six Days Trial and went on to win the Maudes Trophy for 1933. While experimenting with a single bank of Edward Turner's square four engine, Turner and Page had seen potential in the straight twin as a motorcycle engine and found that a 360 degree crank angle suited a single carburettor better than a 180 degree one. The 6/1 was a commercial failure, selling fewer than 600 in two years on the market.