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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
Pretty good
Size: 3-Pack (0.15 Ounce each)
Very helpful to protect sensitive lips. It does have a strong white cast, but it works well.
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Reviewed in the United States on January 2, 2026
★★★★★ 5
Soothing sun protection
Size: 3-Pack (0.15 Ounce each)
Very soothing, great protection for your lips. It seems to stay put too, although I’ll reapply a few times during whatever activity I’m doing
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Reviewed in the United States on June 3, 2026
★★★★★ 5
Smooth with light white cast but not very strong SPF
Size: 2-Pack (0.15 Ounce each)
Works well, goes on smooth, not too much of a white cast. If you're sensitive to the sun, you may need a stronger mineral SPF that could result in a very white cast.
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Reviewed in the United States on March 30, 2026
★★★★★ 3
Good for sensitive skin
Size: 2-Pack (0.15 Ounce each)
A little waxy and wears off quickly, but it helped my dry lips this winter.
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Reviewed in the United States on May 23, 2026
★★★★★ 5
Smooth and lasts long.
Size: 3-Pack (0.15 Ounce each)
This balm is awesome. Most other chapsticks make my lips worse.
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Reviewed in the United States on May 30, 2026
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