Exclusive Offer* All Books Are Autographed By Donny Petersen
Donny Petersen’s insight makes technical issues understandable even to the motorcycle novice in easy-to-understand language.
Do you want to make your Harley-Davidson run faster? Author Donny Petersen, with more than forty years of experience working on and designing Harleys, shows you how to make anything from mild to wild enhancements to your bike. He progresses from inexpensive power increases to every level of increased torque and horsepower. With graphics, pictures, and charts, Donny’s Unauthorized Technical Guide to Harley-Davidson, 1936 to Present offers the real deal in performancing your Harley-Davidson Evolution and guides you on a sure-footed journey to a thorough H-D Evolution performance understanding. This volume examines the theory, design, and practical aspects of Evolution performance; provides insight into technical issues; and explains what works and what doesn’t in performancing the Evolution. He walks you through detailed procedures such as headwork, turbo-supercharging, nitrous, big-inch Harleys, and completing simple hop-up procedures like air breathers, exhausts, and ignition modifications. In easy-to-understand terms, Donny’s Unauthorized Technical Guide to Harley-Davidson, 1936 to Present shares performance secrets and provides clear guidance into what works, what does not, and what’s just okay with performancing the Harley Evolution power train.
Volume III: The Evolution: 1984 to 2000 is the bike that many credit with saving Harley- Davidson from bankruptcy. Who saved the Hog’s bacon? Why did it become the chosen one? How did H-D become the darling of American capitalism? After all, there was a more progressive and practical bike in the works. However, Harley-Davidson is not about practicality.
I will explore the Evolution from different perspectives, explaining why it’s so much faster and more reliable than its Shovelhead predecessor is. However, there is a lot wrong with the Evo that loyal riders love to overlook. I will get my hands dirty demonstrating the many foibles of the Evo.
This updated volume has another 300 pages of information on the Twin Cam. Will Harley-Davidson Survive? The rumor mill swirls mercilessly. Too large, too ostentatious dealerships are going out of business at an alarming rate. H-D stock is on a downspin. Layoffs are occurring. Downsizing is in earnest amid rumours that the venerable Harley-Davidson has become a takeover target. I for one am optimistic. I feel vindicated that the arrogant suits amongst some fine dealers are being bought down more than a few notches. As always, I believe the good business people without debt burden will survive for the most part.
Volume II: Performancing the Twin Cam will be a dynamic introduction to the quest for speed. The Twin Cam is the best platform for performance in the world of Harley.
Carburetors, fuel injection, cams, headwork, strokers, big-bore, supercharging, turbo charging, and nitrous oxide are all hot topics for discussion. I will take the reader through building a very reliable 124-cubic-inch engine using stock Twin Cam engine cases, a feat no previous H-D engine has managed to perform.
Volume I: The Twin Cam
is the comprehensive first book that begins with a secrecy agreement with Harley-Davidson well before the release of the Twin Cam. Donny was one of the chosen few to learn about the new engine and motorcycle in advance of many H-D employees and all the dealers. Bill Davidson leads the team of seven engineers in charge of design, testing, and production who painstakingly taught Donny every facet of the new Twin Cam. In addition, Donny has worked on the Twin Cam 6-days a week ever since.
Donny Petersen offers thoroughly thought out but practical fixes and solutions for whatever ails your Harley-Davidson Twin Cam 1999 to present. Donny explains in everyday language what’s right, what’s wrong, and what’s “just okay” with the Harley Twin Cam power train.
In this second part of his fifth volume on Harley Davidson motorcycles, Donny Petersen who has studied privately with Harley Davidson engineers, shares practical knowledge and streetwise tips on the Shovelhead motorcycle.
Donny presents what Harley-Davidson has to say through the myriad of service bulletins back in the day in everyday language. He also uses his extensive practical experience to constructively critique the official line, offers additional hard-earned information, and then shares what he does with his own bikes. He provides
Solutions to fix the Shovelhead’s teething problems;
Harley’s responses to ongoing problematic aspects of vibration, as well as the aftermarket cures;
Tips on working with the Shovelhead’s 4-carburetors, 5-ignition systems, 3-electric starters, generator/regulator charging system and 3-alternator charging systems (rotors, stators, and rectifiers).
Then Donny tackles electrical switches, circuit breakers, and relays.
He moves onto the 4-wide glide and 5-narrow glide Shovelhead front forks, 9-braking systems, wheels and tires.
Lastly, Donny does lubrication like only he can. He then explains, dissects, and rebuilds the early steel oil pump along with the progression of aluminum oil pumps explaining their foibles, how to fix, and then modify them for superior oiling.
Donny Petersen offers thoroughly thought out but practical fixes and solutions for whatever ails your 1966 to 1985 Harley-Davidson Shovelhead. Donny explains in everyday language what’s right, what’s wrong, and what’s “just okay” with the Harley Shovelhead power train. In this fifth volume of Donny’s Unauthorized Technical Guide to Harley-Davidson 1936 to Present, Petersen analyzes all the theory and insider information he garnered while working on and teaching about this motorcycle for the last forty years.