Donny's Unauthorized Technical Guide to Harley Davidson 1936-2008: Volume I: The Twin Cam

Donny Petersen offers workable solutions for whatever ails your 1999 to present Harley-Davidson. Graphics, pictures, and charts guide the reader on a sure-footed journey to a thorough H-D Twin Cam understanding.

Petersen's insight makes technical issues understandable even to the motorcycle novice. In easy-to-understand language, Donny examines what's right, what's wrong, what's "just okay" about the Twin Cam power train.

This is the first volume of Petersen's long-awaited Donny's Unauthorized Technical Guide to Harley Davidson 1936-2008. This twelve-volume series by the dean of motorcycle technology will examine the theory, design, and practical aspects of his subject.

Donny has studied privately with Harley-Davidson engineers, plus, he's worked on Harleys for over 35 years, having founded Toronto's Heavy Duty Cycles in 1974, North America's premier motorcycle shop.

Having ridden hundreds of H-D Flatheads, Knuckleheads, Pans, Shovels, Evos, and Twin Cams across four continents-doing all of his own roadside repairs-Donny has acquired the practical knowledge what lets him share street-wise tips, as well as walk you through detailed service procedures like porting and polishing cylinder heads to performing simple maintenance like oil changes.

Donny Petersen is honored to share the wealth of his motorcycle knowledge and technical expertise.

Donny established and has operated Heavy Duty Cycles in Toronto, Canada, since 1974; his monthly column Techline has appeared in American Iron Magazine since 1992. Instructed privately by Harley-Davidson engineers, Donny has taught mechanics, designed tech-school curricula, and authored student-licensing examinations. A Toronto resident, Petersen hosts Tech-Talk on Biker TV.