Norton Tuning, Paul Dunstall. Covering 647 & 750cc engines, including the 650SS, Atlas, P11, G15 & all variants of the Commando. Topics covered are similar to those of the companion volume Triumph Tuning. 200mm x 260mm, 32 pages, softbound, b&w illustrations.

Tuning For Speed, Phil Irving. This is the sixth edition of a work first published in 1948. It provides tuning information for touring, racing & competition bikes. It concentrates on engine/gearbox related topics, but it includes ignition system & carburation. 150mm x 220mm, 260 pages, hardbound, b&w illustrations.