BOOK OF THE BSA TWINS 650cc & 500cc 1948-1962 - Paperbackby Floyd Clymer (Created by), Velocepress (Producer) Originally published under the title The Book of the BSA Twins by W. C. Haycraft this book is one of The Motorcyclist's Library series published in the USA by Floyd Clymer by arrangement with the original publishers Pitman Ltd. of London, England. It includes complete technical data, service and maintenance information and detailed instructions for the repair and overhaul of the major mechanical and