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.
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.