Beschreibung:

Designed by Bert Hopwood and introduced late in 1949, the BSA A10 650cc twin closely followed the basic pattern established by his 500cc A7 while contriving to be almost entirely different in detail. The existing parallel twin architecture was retained for the new A10, with 360-degree crankshaft and single camshaft at the rear of the cylinder block, as was the four-speed gearbox bolted directly to the crankcase in a form of semi-unit construction. The cycle parts remained virtually unchanged, though the larger twin’s 8” front brake was one obvious difference. Fitted at first only to export models, the 4.25-gallon fuel tank became available on the home market after one year, as did the striking metallic beige finish of the ‘Golden Flash’ version. By the end of the succeeding decade, BSA’s rugged 650cc twin had undergone considerable development. 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. The Golden Flash continued in production until superseded by the new unitary construction twin 1962. This BSA A10 was supplied new via Rivetts of Leytonstone and originally finished in black. Totally restored to concours condition in 2000, the machine is presented in excellent condition throughout and offered with BSA Owners Club dating certificate, MoT to August 2008 and Swansea V5 registration document.