Book excerpt: This authoritative book, elegantly written in highly digestible style by the foremost expert on the subject, provides in-depth analysis of classic motorcycle race engines spanning eight decades, from the 1930s Guzzi 500 120-degree twin to the latest Yamaha YZR M1 in-line four. Packed with technical detail, the book provides an absorbing insight into the technology employed in a wide variety of motorcycle engines, investigating the diverse approaches taken by various manufacturers over the years in the search for race-winning performance.