Donny Petersen 
Donny’S Unauthorized Technical Guide to Harley-Davidson, 1936 to Present 
Volume Vi: the Ironhead Sportster: 1957 to 1985

Donny Petersen feels honored to share the wealth of his motorcycle knowledge and technical expertise.
He offers the real deal in understanding the Harley-Davidson. He gives workable solutions for whatever ails the 1957 to 1985 H-D (Ironhead) Sportster. Graphics, pictures, and charts guide the reader on a sure-footed journey to a thorough understanding.
Donny intersperses the technical explanations with entertaining true stories of the hard core lifestyle of these years including The Wild One, Easyriders, the Birth of Hog, Willie G., Steppenwolf, Evil Knevil, the reviled AMF, 1%ers, and who could forget Elvis Presley.
Petersens insight makes technical issues understandable even for the novice.
This is the eighth volume of twelve of Donnys technical series. Petersen is the dean of motorcycle technology. Donny examines the theory, design, and mechanical aspects of the Ironhead Sportster.
Donny has ridden hundreds of Harleys across four continents doing all of his own roadside repairs. He has acquired his practical knowledge the hard way.
Donny Petersen has the privilege of sharing his technical secrets with easy understanding. He will walk you through detailed mechanical procedures concerning the power train, electrical, fuel delivery, ignition, and the gear head favorite subject of oil and lubrication.

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DONNY operated Heavy Duty Cycles in Toronto, Canada, for thirty-six years; his monthly column, “Techline, ” has appeared in American Iron Magazine since 1992. Instructed privately by Harley-Davidson engineers, Donny has taught mechanics, designed school curricula, and authored mechanic-licensing examinations. Donny’s hobbies include riding, boating, fitness, and traveling.