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 electrical components for all models of BSA pre-unit twin cylinder motorcycles from 1948 through 1962. There is adequate detailed text and diagrams to assist in major refurbishing such as an engine rebuild or even a complete renovation. This is a - must have - reference for any BSA enthusiast and would certainly assist in helping any potential purchaser better understand the inner workings prior purchasing of one of these classic motorcycles. Applicable to all 500cc and 650cc variations of the A7 and A10 pre-unit OHV twins this publication has been out-of-print and unavailable for many years and is becoming increasingly more difficult to find on the secondary market and we are pleased to be able to offer this reproduction as a service to all BSA enthusiasts worldwide.

124 pages, 78 black & white illustrations, size 5.5 x 8.5 inches. Originally published under the title The Second Book of the BSA Twins by A.G. Lupton, 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 electrical components for A50 & A65 BSA twin cylinder models from 1962 through 1969. There is adequate detailed text and diagrams to assist in major refurbishing such as an engine rebuild or even a complete renovation. Applicable to all 500cc & 650cc BSA unit construction A50 & A65 twins including the Royal Star, Thunderbolt, Wasp, Cyclone, Hornet, Lightning & Spitfire. This publication has been out-of-print and unavailable for many years and is becoming increasingly more difficult to find on the secondary market and we are pleased to be able to offer this reproduction as a service to all BSA enthusiasts worldwide.

196 pages, and more than 250 illustrations and charts, size 8.25 x 10.75 inches. In 1945, after the war had ended, BSA resumed production of their civilian line of motorcycles. However, they continued their pre-war practice of publishing repair, overhaul and technical information in the form of individual 'Service Sheets'. These sheets were 'dealer only' publications and, as such, the print quality was at times somewhat questionable. It was not until the early 1960's that BSA eventually started publishing model specific workshop manuals that were available to the general public. Consequently, these 'Service Sheets' were the only publications available for the maintenance and repair of BSA models that were manufactured through the early 1960's. At some point in the 1930's, BSA adopted the practice of identifying their various model types by 'groups' and the models manufactured from 1945 through the early 1960's were in Groups A, B, C, D and M. The service sheets that were associated to a particular group were identified numerically and, while there were some exceptions due to overlapping data between models, in general terms the numbers relate to a particular model group. They are as follows: The 200 series of service sheets were applicable to Group A models, the 300 series to Group B, the 400 series to Group C, the 500 series to Group D and the 600 series to Group M. In addition, there were a 700 series applicable to mechanical maintenance and an 800 series for electronic service and wiring diagrams. Both the 700 and 800 series of service sheets contained information that was not model specific but was applicable across multiple model groups. Unfortunately, as these service sheets were issued individually and at random times, the numbering sequence within any group is not necessarily consecutive and, at times, illogical. Consequently, assembling those individual sheets into a publication that serves as a model specific workshop manual is a somewhat difficult task and owners of BSA motorcycles are subjected to considerable confusion surrounding the appropriate selection from the multitude of reprints that have recently flooded the on-line marketplace. Many of the reprints found on internet websites are from 'bedroom sellers' at enticingly low prices by individuals that really have no idea what they are selling. Many are nothing more than poor quality comb-bound photocopies that are scanned and printed complete with greasy pages and thumbprints and, as such, are deceptively described as 'pre-owned', 'used' or even 'refurbished'! In addition, they are often advertised for the incorrect series and/or model years of motorcycles. The most complete compilation of the 1945 and onwards service sheets was issued by BSA in the form of a 'dealer only' ring binder that contained all of the individual service sheets totaling to almost 500 pages. This manual is a compilation of the service sheets that were collated and published by BSA in the late 1950's and early 1960's under part numbers 00-4017 (pre-swing arm) and 00-4047 (swing arm), which excluding duplicates, consisted of 44 service sheets in total. However, an additional 14 sheets from the ring bound 'dealer only' publication have been added to produce a single manual containing 58 service sheets (190 pages) that cover the entire range of pre-unit A7 and A10 models from 1947 to 1962. Please note that service sheets in the 300, 700 and 800 series that are included in this publication will also include data that is applicable to 'other' model groups, as that was the original intention. For additional information the reader is directed to 'The Book of the BSA Twins 650cc & 500cc 1948-1962' (ISBN 9781588500977).

The BSA 500 and 650cc Unit Twins were the top-of-the-range models for BSA from the early 1960s through to the Rocket 3 of 1969. The model range covered every angle, from staid tourer, through off-road racers through to true-road burners. This book has two parts - the first describes the design and development of the range from its inception in 1962 to the final demise of BSA in 1973, detailing the various models produced each year. The second part of the book looks at the practicalities of restoring and running the model, through documenting both owners' experiences and a full restoration of a typical bike. The illustrated record of the restoration of a 1965 Lightning identifies the pitfalls that will confront the restorer and the practical modifications that can be made to provide a reliable mount for today's traffic conditions.