Volume One in our Shop Dope Series covers the early singles, twins, including Sport Models and 2-cam models. Packed with vital information necessary to restore and operate pre-1929 models. Contains twelve pages on the two speed hub with complete cross section and parts diagrams, repair and adjustment instructions for magnetos, generator, coil and horn, complete wiring diagrams and four pages covering Zenith carbs. This edition also has detailed motor fitting and specification charts and includes 2-cam, racing information and set-up specifications.