The BSA Spitfire is a British motorcycle, launched in 1966. One of the first BSA’s to have 12-volt electrics, the Spitfire was also one of the first "street racers" with two large-bore Amal GP carburettors, complete with velocity stacks.
The Spitfire had a new twin-downtube steel frame and new Girling shocks. A 190mm front drum brake improved braking and lightweight alloy rims reduced the weight to 174kg.
The 1968 MkIV Spitfire was the last made. Amal’s new Concentric carburettors were combined with twin-leading-shoe front brakes and independently adjustable Lucas ignition points for easier starting. Engine power output was increased to 53 bhp.