Triumph's First Twin: Triumph 6/1

Triumph’s first production vertical twin was not the Speed Twin; it was Valentine Page’s Triumph 6/1.

Right Side Triumph
While working with the new engine on the test bench, Turner and Page removed the front crankshaft as an experiment. The resultant 250cc vertical twin delivered such smooth power that Page wondered why they were “bothering with a four.”
Photo By Mick Robinson