The Rupert Ratio Unit Single Manual - Volume 2 Everything but the Engine

The Rupert Ratio Unit Single Manual Volume 2 : Everything But The Engine for BSA C15, B25, B44, B50 and Triumph TR25w does exactly what it says: covers every model from the beginning to the end of the Unit Single production run. This is the most comprehensive restoration guide (338 pages) to the Unit Single there is, a goldmine of invaluable information and advice for all owners of Unit Singles in both BSA and Triumph variations.

Here you will find a complete description of every component and system for all Unit Singles (C15, B40, B25, B44, B50 and Triumph TR25w) including all the myriad detailed factory modifications, the reasons for the changes, modern equivalents (especially paints) and modifications to improve roadworthiness. Comprehensive descriptions of all the frames, tanks, wheels, tinware, stands, brakes, suspension, seats, exhausts, electrics, paint colours and finishes, controls, instrumentation, tools and even the nuts and bolts are included - if it is a Unit Single then the answers are here!

Amazingly detailed and well illustrated with a colour section for the transfers (decals) - this book is a real boon to owners of BSA (and Triumph) Unit Singles.

Image: BSA Unit Single Volume 2 Rupert Ratio