sentences:  Although quickly mimicked by competitors, eventually Turner relented on this unpopular feature, the 'bathtub' becoming more and more abbreviated until disappearing altogether on the final 1966 versions.Sportier versions of both the 5TA (the Tiger 100) and 3TA (the Tiger 90)were produced from 1960–1974 and 1963–1969, respectively.In 1958 a twin-carburettor version of the 650 engine emerged.