Merlin Books Rupert Ratio BSA C15 C25 B25 B44 B50 B40 250 350 441 500 unit workshop manual owners manual engine

Rupert Ratio BSA Unit Singles Engine Manual

Armed with this book even the least experienced 'spanner man' will be able to not only rebuild a BSA Unit Single, but make it go better and more reliably than even BSA thought possible!
Covers C15, B25, B40, B44 & B50
This book quite literally takes the BSA (and Triumph) Unit Single engine apart, then it shows how to rebuild the engine correctly. The book includes wiring diagrams, complete specifications, hundreds of illustrations, a wealth of invaluable advice and tuning tips to make your unit single perform!
The Rupert Ratio Unit Single Engine Manual will also be of interest to all BSA enthusiasts since it charts the development of one of the last and most successful machines to come out of Small Heath. Long after the factory closed Unit Singles were still a competitive force in trials and motocross riding and many are still used for that purpose today.
Rupert Ratio is a long time contributor to the journal of the BSA Owners Club, The Star, on technical matters relating to BSA Motorcycles. He is also one of the many 'Agony Uncles' for membes of the club, i.e. a technical consultant who can offer advice and assistance to club memebers when their beloved Beesas are beset by mechanical afflictions. He carries out the latter role under his real name, Dave Smith, who is a design technology teacher by profession.
Contents: Introduction, The Unit Single Saga, Unit single quick stripdown guide
Preparation of aluminium castings, Lubrication system, Main bearings
Crankshaft and conrod assembly, Timing side, Gearbox
Kick start mechanism and outer timing cover, Primary drive, Cylinder and piston
Pushrods, Cylinder head, Rockerbox, Engine breathing, Electrical system
Carburation, Life with a B40, Specifications, Exploded engine drawings, Appendix: Rupert Ratio engine stand, Index

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