Four-Stroke Performance. By A. Graham Bell. Editions Haynes, 1991.

In Four-Stroke Performance Tuning A. Graham Bell combines his first-hand practical experience in this field with recent theory in engine design, extending into other allied areas, such as carburettors, fuels, ignition systems, exhaust systems etc. A wealth of data is included, covering basic engine and explanatory line drawings. 254 pages  in English with hard cover. 24 x 17 centimeters size book.