The Triumph Terrier was styled to appeal to the young enthusiast. The choices available in the smaller capacity machines were mainly utilitarian two-stroke motorcycles that were dull in performance and looks. The Terrier was a miniature version of Triumph's Speed twin, and it was powered by a four stroke motor, like a proper bike. The following year a larger capacity sports model, the Triumph Tiger Cub, was introduced. This motor design was the basis for the BSA single cylinder models, from 250 to 500cc.
