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