BSA Unit-Construction Twins: The Complete Story

The BSA Unit Twin range was launched in the early 1960s, and remained in production until the demise of BSA in 1973. They never attracted quite the plaudits heaped on their Triumph equivalents, but they were robust, popular machines, beloved of tourers, racers and off-roaders alike. Powered by a V-twin engine of 500 and 650cc, they were, until the arrival of the three- cylinder Rocket, BSA's top-of-the-range machines. The author has written the first full-length book to deal with the BSA A50 and A65 Unit-twin range. He gives us history, full specification details, year-by-year changes, competition fortunes and riding experiences. Also described is the complete restoration of a bike - a 1965 Lightning bought especially for this book.