Donny'S Unauthorized Technical Guide to Harley-Davidson, 1936 to Present

About the Author

Donny Petersen, who studied privately with Harley-Davidson engineers, shares practical knowledge and street-wise tips in the fifth volume of his unauthorized guide on the best motorcycle maker in the world.

Content and Approach

Written in straightforward language, this guide can help even a motorcycle novice to become an expert mechanic by following Donny's step-by-step instructions. Whether you're looking for detailed service procedures such as fitting engine bearings or simple tips on maintenance, Donny is eager to share the expertise he's stockpiled on the Shovelhead over the last forty years.

Stories and Solutions

Donny shares real stories so you can find solutions to whatever is ailing your Shovelhead. Resolve teething problems, troubleshoot problematic aspects of the engine, and fix whatever comes up with various models.

Tools and Technical Details

Gear ratios, torque multiplication, and H-D and aftermarket tools of the day are prominent in the guide, which even includes information on tools Donny invented himself to make your life easier. Get the specifications for tightening all the Shovelhead fasteners and adjustments to mechanisms on various models.

Style and Perspective

In his usual forthright manner, Donny makes technical issues understandable, interspersing explanations with entertaining stories about the hardcore lifestyle that comes with being a Harley rider.