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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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Product Reviews
★★★★★ 1
Mid at best
Style: dog ball launcher
It’s mid at best. Requires a little trick to get it to go forward and not just fly up in the air., it’s also not telescoping. It just comes apart into two pieces.
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Reviewed in the United States on March 29, 2026
★★★★★ 5
Better than expected
Style: dog ball launcher
Works GREAT !!
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Reviewed in the United States on March 21, 2026
★★★★★ 1
Wouldn’t buy again
Style: dog ball launcher
Compared to the namebrand thrower this one sucks. It just throws the ball way up in the air.
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Reviewed in the United States on March 29, 2026
★★★★★ 5
🧦 Simple & Effective – ZenToes Moisturizing Socks Review ✨
Color: Green Gingham & Multi Plaid, Size: Regular
These ZenToes moisturizing socks are such a smart and effective solution for dry, cracked heels! I really like that they only cover the heels instead of the whole foot—no hot, sweaty toes, which is a huge plus.
They come in a pack of two, and for the price, it’s a great value. I also found that they fit well and stayed in place overnight. They were a bit snug around my foot, but still comfortable enough to wear.
What really impressed me is how well they work. The socks are nice and thick, and after just one use overnight, my heels were noticeably smoother. Even better—the results lasted about a week without needing any extra lotion, which I personally love since I’m not a fan of applying creams.
I would definitely buy these again and highly recommend them if you’re looking for an easy, low-maintenance way to keep your heels soft.
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Reviewed in the United States on March 22, 2026
★★★★★ 5
They work!!
Color: Fuzzy Slate Gray, Size: Regular, Color: Fuzzy Slate Gray, Size: Regular
I bought these to replace a very old pair that I originally got at Bed Bath and Beyond like 20+ yrs ago, and the fabric was starting to fray. However, the gel pad inside (at the heel) was still working just fine. Anyway, this new set includes 2 pairs, with a gel pad inside each heel area. Results are truly amazing, I kid you not. You can use them without a moisturizer, but I like to put moisturizer on my heels, then wear these overnight, and in the morning my heels are soft, with no dry skin and NO cracks. I like the fact that these are kind of soft and fuzzy (outside), but I LOVE that they leave your toes exposed and cool (because my heels feel kind of warm from the moisturizer and gel pad). They are of good thickness, and I feel they will last a long time (of course remains to be seen). Highly recommend.
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Reviewed in the United States on March 27, 2026
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