Get the full story of the one incredible engine that launched the motorcycle engine to stand up against automotive engines: the Knucklehead.

This book illustrates and describes the correct parts, finishes, and options for all Knuckleheads, from the 1936 debut through the 1947 bikes, the last year of production.

Arranged chronologically, presents a history of every major motorcycle model produced by the legendary company since 1903.

The classic collectibles! From the highly collectible singles built in the 1900s to the Flathead, Knucklehead, and Panhead powered machines, Hatfield winds his way through Harley-Davidson history up to 1965. Packed with information on where and how to find these machines, how to identify rare and unusual models and how to determine the value of the classics. This book contains a delightful mix of original and archival photographs of each model while it rates the collectibility of the model's value with the traditional Buyer's Guide 5 star rating system.

Donny is the Winner of the 2012 International Book Awards. Donny Petersen offers the real deal in performancing your Harley-Davidson Twin Cam. Graphics, pictures, and charts guide the reader on a sure-footed journey to a thorough H-D Twin Cam performance understanding. Petersen's insight makes technical issues understandable even for the novice. Donny simply explains what unfailingly works in performancing the Twin Cam. This is the second volume of Petersen's long-awaited Donny's Unauthorized Technical Guide to Harley Davidson 1936 to Present. This twelve-volume series by the dean of motorcycle technology examines the theory, design, and practical aspects of Twin Cam performance. Donny studied privately with Harley-Davidson engineers, having worked on Harleys for over 35 years. He founded Toronto's Heavy Duty Cycles in 1974, North America's premier motorcycle shop. Donny has ridden hundreds of performanced Shovels, Evos, and Twin Cams across four continents doing all of his own roadside repairs. He has acquired his practical knowledge the hard way. Donny has the privilege of sharing his performance secrets the easy way. Donny will walk you through detailed performancing procedures like headwork, turbo-supercharging, nitrous, big-inch Harleys and completing simple hop-up procedures like air breathers, exhausts, and ignition modifications. Donny Petersen feels honored to share the wealth of his motorcycle knowledge and technical expertise.