Lot 167: 1960 BSA 646cc A10

Introduced in 1949, BSA’s rugged 650cc twin had undergone considerable development by the end of the succeeding decade. On the cycle parts front, the introduction of a swinging-arm frame in 1954 had resulted in the original bolt-up gearbox’s replacement by a conventional separate item, while the engine had benefited from numerous improvements including an increase in compression ratio for 1958 and the standardisation of the sports models’ high-lift camshaft for 1959. This A10 benefits from a recent engine rebuild that included the installation of +0.040” pistons. The machine is offered with Swansea V5 registration document.