Triumph 6/1

Triumph 6/1
Triumph 6/1
ManufacturerTriumph Motor Company
Production1933-1935[1]
AssemblyCoventry, UK
SuccessorTriumph Thunderbird
ClassHeavyweight standard
Engine649 cc[1] OHV parallel-twin
Bore / stroke70 mm × 84 mm (2.8 in × 3.3 in)[2][3]
Top speedest. 85 mph (137 km/h)[1][2]
Power25 bhp at 4,500 rpm[1][2][4]
TransmissionFour-speed manual;[5] hand-shift (foot-shift available in 1935)[1][5]
Frame typeTubular steel dual downtube[5]
SuspensionGirder fork, rigid rear[1][5]
BrakesLinked 8 in (203 mm) drum brakes front and rear
Oil capacity7 imp pt (4.0 L)[6]

The Triumph 6/1 is a motorcycle that was made by Triumph at their Coventry factory from 1934 to 1936. Designed by Val Page, the 6/1 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. The 6/1 was a commercial failure, selling fewer than 600 in two years on the market.

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