sentences:  1966 saw Turner working on a large-displacement, four-cylinder engine design which was not built.In 1967, Turner, at 66, retired from the BSA Board and Harry Sturgeon took his place.Unlike Turner, Sturgeon was convinced Triumph had to be involved in racing, and John Hartle won the 1967 Isle of Man TT production event on a Bonneville, just before Harry Sturgeon suddenly died, and was replaced by Lionel Jofeh.