First announced by Edward Turner in October 1958, the Triumph Tigress/BSA Sunbeam did not enter production until late 1959. The scooters were available with two different engine types - a BSA Bantam derived 175cc 2-stroke single or a newly designed 250cc 4-stroke parallel-twin. Both were fan cooled. The 250 used a gear driven gearbox, rather than a chain. Both engine types used a fully enclosed chain final drive. Some of the 250s were fitted with a 12v electrical system and starter. The 250 was the more successful version and had a top speed of 105kph. Build quality was a problem however. It was discontinued in 1964 with the 175 ceasing production the following year.
See also Triumph Tigress
Source: Phil Aynsley
