SKU: 5394290376

Donny's Unauthorized Technical Guide to Harley Davidson 1936 to Present: Volume II: Performancing the Twin CAM

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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: Hardcover
Publisher: iUniverse
Published: 12/24/2008
ISBN: 9780595515165
Pages: 740
Weight: 2.71lbs
Size: 9.00h x 6.00w x 1.75d
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SKU: 5394290376

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M.H.
Charlottesville, US
★★★★★ 5
Great Cap.
Size: One Size, Color: (647) Prime Pink / / White
Fits well.
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Reviewed in the United States on February 26, 2026
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msnnyl
Fort Morgan, US
★★★★★ 4
Nice adjustable strap
Size: One Size, Color: (015) Halo Gray / / Astro Pink
Okay cap with adjustable strap and lightweight material. Doesn’t hold its shape well. But otherwise it’s a okay cap to throw on for sun protection .
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Reviewed in the United States on May 16, 2026
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Marvin Gomez
Battle Creek, US
★★★★★ 5
Great
Size: One Size, Color: (015) Halo Gray / / Astro Pink
Product is as described, love the material and it’s true to size. The shape is very nice and the material is sun protective which is good to control sweating in your head.
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Reviewed in the United States on April 17, 2026
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Natalia
Dallas, US
★★★★★ 5
Muy buena
Size: One Size, Color: (100) White / / Halo Gray
Muy cómoda y la calidad increíble
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Reviewed in the United States on May 24, 2026
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Clara María
Phoenix, US
★★★★★ 5
Precioso
Size: One Size, Color: (015) Halo Gray / / Astro Pink
Ajustable está muy hermosa ,tiene un color bello
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Reviewed in the United States on May 13, 2026

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