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Description
Donny's Unauthorized Technical Guide to Harley Davidson 1936 to Present: Volume II: Performancing the Twin CAMDonny 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
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.
Binding Type: Paperback
Publisher: iUniverse
Published: 12/24/2008
ISBN: 9780595527458
Pages: 740
Weight: 2.36lbs
Size: 9.10h x 6.06w x 1.74d
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★★★★★ 4
Great wiper
Size: 24" 20" 11"
Very effective. They are quiet and did the job. Easy to install.
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Would buy again
Size: 26"/14"/12"
These wipers are fantastic. They were easy to install and conformed to the windshield perfectly. Did a great job wiping the rain away. Best thing of all is they lock into place on the wiper arm.
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Reviewed in the United States on May 3, 2026
★★★★★ 5
Great value
Size: 26"/17"/14"
Used on a 2018 outback. These are an amazing value. All 3 fit perfectly and work great. They work smooth and silently
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Reviewed in the United States on May 4, 2026
★★★★★ 4
Great price, easy install; fit
Size: 25" 22" 15"
Great price, easy install; fit My Volkswagen Tiguan 2023 S. Glad I waited for next day delivery instead of going to autozone where comparable wipers cost $45 and that was WITH two coupons!! It would have been $60 without. The ONLY thing that could be better is warning you to make sure when you’re pressing in the wiper that you hold it from the very top or else your finger will slam down into the trap part and it will hurt like heck and make you bleed (personal experience this afternoon…) Otherwise great. Took off one star for that but maybe Im the only person thats ever happened to? (Im doubtful.) its not directly related to the product itself but just would be a helpful tip for ANY windshield wipers to include!
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Reviewed in the United States on April 18, 2026
★★★★★ 5
Good quality
Fits perfectly
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Reviewed in the United States on February 5, 2026
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