Rupert Ratio books

Those of us who have unit BSA singles should really have the Rupert Ratio handbooks on our shelves. Pretty much the bibles for the C15 up to the B50 in all its incarnations and split into Vol 1 – The Engine and Vol 2 – Everything but the engine, a third volume is due out soon. This will concentrate on some of the special models of unit BSA. Since the demise of Panther Publishing, Rupert Ratio has taken on the mantle of self publishing his books and they are available at www.ratiopublishing.co.uk