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| | Customer Reviews: | | | Average Customer Review: ( 14 customer reviews )
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Most Helpful Customer Reviews
11 of 12 found the following review helpful:
 Yoda Speaks Jul 20, 2008
By Unlucky Frank
Anyone that has been sucked into the Harley mystique and owns one of these expensive power mills owes it to themselves to read anything and everything by Harley Technical writer, Donny Petersen. Donny is the Jedi Master of Harley Davidson power trains. Donny's monthly tech articles for the extremely popular AMERICAN IRON magazine are indispensable guides for Modern Harley owners and mechanics. His articles are the primary reason I own a subscription to the magazine. I've learned a lot about Harleys from this man. His technical writing is brilliantly comprehensive to the expert and the layman. Donny is an invaluable teacher and second to none.
This volume contains articles about the Modern Twin Cams (1999 to the present). I suspect this series is going backwards in time if it is the first in a 12 volume set. What's covered in this volume is the introduction of the Twin Cam engine in late 1998, early Twin Cam problems, timing chest and gears, the history of Harley oil leaks, air flow problems, modifying Twin Cams into older frames, the clunky (my words) new 6 speed tranny, and the introduction of the 2007 96ci engine. My guess is that subsequent volumes will contain more indepth articles on the Twin Cam 88, 96, and 110 CVOs, while regressing to the earlier engine designs.
Here's hoping that Donny covers the entire gamut of Harley engine evolution going back to EVOs, Shovels, Panheads, and Knuckleheads. (Starting with the 1936 Knucklehead means there will be no coverage on the 1909-1936 Flathead.) Even though I don't own any of these older mills, I'll surely purchase every volume. Donny makes reading the history of Harley engine design fascinating, to say the least. And must own reading for owners of these older engine designs.
My only complaint with Donny is that I think he's a little too forgiving of the new '07 and '08 EPA induced Harley design. These closed loop engines run far too hot and lean for an air cooled motor. IMHO, unmodified engine longevity and performance has got to be a serious issue with the newer Harleys. Donny has touched on the future of the Twin Cam due to overwhelming EPA constraints and the possible death of the Harley air cooled mystique. It could spell the end of the Classic Harley Davidson look. (I know there are some bearded diehard enthusiasts that are frowning right now. Man, I feel your pain. I have a little tear in my eye too.) Things are changing. The future is the water cooled design of the Harley V-Rod. If you own an '07 or '08 Twin Cam, you owe it to yourself to do some online research into overheating, "parade mode", and the O2 sensors. As far as I know, Donny has not mentioned the "wideband" O2 sensors fix for reducing the lean condition of these motors in any of his tech articles for AMERICAN IRON. I could be wrong, having possibly missed it or skimmed over it. And an investment into an oil cooler is a must. I did some online research into this for two of my friends that own '07 TC96s. And I have to say, I'm just grateful that I own an '06 TC88.
Other than this minor quibble, this is the man to read when it comes to understanding Harley power trains. If waiting to buy 12 volumes of tech articles is a little daunting, a subscription to AMERICAN IRON is in order. If for no other reason than to get Donny Petersen's tech articles. (Sorry Genevieve, but AMERICAN IRON needs more swimsuit models posing with the customs. Just a suggestion, Chris.)
Thanks, Donny. Keep up the great work. I always look forward to reading your knowledgeable articles.
ENJOY.
5 of 5 found the following review helpful:
Enlightening Nov 16, 2008
By Alan E. Biggs
"A. Biggs"
This intuitive and concise explanation of the Twin cam engine is by far one of the easiest technical reads I have encountered.
Donny Petersens conveyance of physics, geometry and how they apply to basic principals of engine dynamics makes the understanding seem simple.
I am certain that all one needs to do is study this, and the successive volumes to be able to understand enough to troubleshoot any problems
with his or her twin cam engine! Knowledge is power.
I'll not digress and insult any female journalists, AIM magazine and ALL of it's contributing writers make it the premeir Motorcycle monthly.
Thanks again Donny for sharing!
10 of 12 found the following review helpful:
 this book is a mess Oct 19, 2008
By Charles Oaks
"Charley"
I like to have multiple reference manuals on anything I work on, since what one author may neglect, another will cover. Also, many technical manuals assume their readers to already have previous knowledge and skills. I've been stymied in the past when I'd encounter a statement in a manual like "remove outer cover" and there I would sit, staring at the damn thing, wondering why I can't get the cover off after tugging and wiggling and looking around under and alongside for screws or something thats holding this damn thing on. Then I find, trail and error, push this side, lift opposite side, pops off like it's pressurized. Why the hell didn't it say that in the manual?
Hey, I've never touted myself as a mechanic, but I like to do as much as I can to save money and have the knowledge in case I'm out on the road with a busted bike.
Probably Mr. Petersen does not have that problem. I've no doubt Donny is an crackerjack mechanic on Harleys, but his book is poorly organized, horribly edited and I feel more than a bit cheated.
I found a duplicate sub chapter in the first section and actually flipped the pages back and forth a couple of times thinking the printer had inserted the same page twice. Nope, different page numbers, same text.
One of the first photos I saw was a the inside of an evo head next to a twin cam head. The twin cam head was just a black blob without detail since it had carbon buildup on it. Completely useless.
I was expecting more cookbook fixes, how-to's with photos and illustrations and exploded diagrams. What I got was a collection of stories about visits to the powers-that-be at Harley and motorcycle trips, jumbled up with engineering explanations that are too general for me to use. While it was kind of cool reading about the secret inner workings of HD, that's not why I got the book and there is page after page of it.
I'm just a guy with a 2003 wide glide that wants to work on it and since I don't wrench for a living, need quite a bit of help from manuals. Perhaps my second run through this book can yield some helpful hints, but honestly, I don't really hold much hope.
Can't really recommend this book, except as a curiosity.
2 of 2 found the following review helpful:
A Great Book For the Harley Enthusiast Dec 15, 2008
By Central Valley Reader
This is a GREAT book if you are a Harley Enthusiast looking for a greater understanding of the engineering and basic mechanics behind the Harley Davidson Twin Cam.
As one reviewer has said there are some 1st edition publishing blunders within the book such as the repeated pages and duplicated statements. But you can tell it was written by a gear head for gear heads.
I love the Chapter on Donny's first viewing of the Twin Cam Engine. He goes over all of his thoughts and requirements of what he wanted to see and also goes over what Harley has done to improve the engine since its 2000 introduction to the public. After reading this book you will have a new appreciation of the FATHEAD.
I for one am looking forward to the next edition!
1 of 1 found the following review helpful:
Twin cam Guide Mar 20, 2009
By Darrell H. Stewart
This book was very informative, Donny is very informative. I Purchased his second volume as will. I was impressed with the amount of info.
See all 14 customer reviews on Amazon.com
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