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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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4.7 ★★★★★
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Product Reviews
★★★★★ 5
👍
Size: 1-pack
Good travel size. Works well.
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Reviewed in the United States on August 24, 2025
★★★★★ 5
well made
Size: 1-pack
great for weak shoulder to get it way out there
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Reviewed in the United States on January 6, 2025
★★★★★ 5
Cute, fun treat that’s perfect for a dog’s birthday
Flavor Name: Boy, Size: 8 Count (Pack of 1)
This Thoughtfully Pets blue dog birthday cookie is such a fun way to celebrate a pup’s special day. The packaging is adorable and really makes it feel like a treat meant for an occasion, not just an everyday snack. The cookie itself feels well made and sturdy, and my dog was very excited about it. I also liked that it didn’t have an overpowering smell and didn’t crumble everywhere when broken into pieces. It’s a great size for gifting or as a little birthday surprise, and it definitely made the moment feel more special. Overall, it’s a cute, thoughtful treat that’s perfect for celebrating a dog birthday and bringing a little extra joy to the day.
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Reviewed in the United States on January 8, 2026
★★★★★ 5
Your dog will love them !!
Flavor Name: Boy, Size: 8 Count (Pack of 1)
Awesome! So cute!! My birthday boy enjoyed them !!! He turned 14 !!! 💙💙💙
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Reviewed in the United States on February 22, 2026
★★★★★ 5
Picky dog approved!
Flavor Name: Boy, Size: 8 Count (Pack of 1), Flavor Name: Boy, Size: 8 Count (Pack of 1)
My elder beagle generally doesn’t like cookie or biscuit type of treats. He prefers soft bacon types. I ordered these for his doggy 12 year birthday so his attending “friends” could all share the treats. I wasn’t expecting him to eat it, but wanted the set for the occasion. He took a sniff and immediately took the treat and ate it. He loved it as did the other dogs (one of those also a “picky treat eater” All of the dogs loved them. I will definitely be ordering again for special occasions.
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Reviewed in the United States on February 14, 2026