It had a 70mm bore and 84mm stroke, a revised alloy rocker box and cast-iron cylinder head, plus an integral manifold for the single Amal Carburetor. Bert Hopwood, designer of Triumph’s Speed Twin, having been enticed away to Norton for but a year and the design of their Dominator engine, was persuaded to join BSA in 1948 and set the task of creating a competitive 650 twin.Įssentially a redesign of the A7, increased to 650cc, the Hopwood-designed A10 Golden Flash was launched in 1949. They had the A7, a 500cc parallel twin, but needed a 650 to stay in the running. The largest manufacturer of motorcycles in the world had to retaliate. Triumph had rocked the BSA boat of motorcycle manufacture with the introduction of the 650cc Thunderbird in the early ‘50s.
0 Comments
Leave a Reply. |