Donny Petersen offers workable solutions for whatever ails your 1999-topresent Harley-Davidson. Graphics, pictures, and charts guide the reader on a sure-footed journey to a thorough understanding of the H-D Twin Cam.

Petersen's insight makes technical issues understandable-even for the motorcycle novice. In easy-to-understand language, he examines what's right, what's wrong, and what's "just okay" about the Twin Cam power train.

"Volume I: The Twin Cam" is the updated first volume of Petersen's long-awaited "Donny's Unauthorized Technical Guide to Harley-Davidson, 1936 to Present" series. This twelve-volume series by the dean of motorcycle technology examines the theory, design, and practical aspects of all things Harley-Davidson.

Having ridden hundreds of H-D Flatheads, Knuckleheads, Pans, Shovels, Evos, and Twin Cams across four continents-and doing all of his own roadside repairs-he has acquired a wealth of firsthand practical knowledge that he now shares. He dispenses streetwise tips and walks readers through detailed service procedures-including everything from porting and polishing cylinder heads to performing simple maintenance, like oil changes.

Donny Petersen, who studied privately with Harley-Davidson engineers, shares practical knowledge and street-wise tips in the fifth volume of his unauthorized guide on the best motorcycle maker in the world.

Written in straightforward language, this guide can help even a motorcycle novice to become an expert mechanic by following Donny's step-by-step instructions. Whether you're looking for detailed service procedures such as fitting engine bearings or simple tips on maintenance, Donny is eager to share the expertise he's stockpiled on the Shovelhead over the last forty years.

Donny shares real stories so you can find solutions to whatever is ailing your Shovelhead. Resolve teething problems, troubleshoot problematic aspects of the engine, and fix whatever comes up with various models.

Gear ratios, torque multiplication, and H-D and aftermarket tools of the day are prominent in the guide, which even includes information on tools Donny invented himself to make your life easier. Get the specifications for tightening all the Shovelhead fasteners and adjustments to mechanisms on various bikes.

In his usual forthright manner, Donny makes technical issues understandable, interspersing explanations with entertaining stories about the hard core lifestyle that comes with being a Harley rider.

In this second part of his fifth volume on Harley-Davidsons motorcycles, Donny Petersen, who studied privately with Harley-Davidson engineers, shares practical knowledge and streetwise tips on the Shovelhead motorcycle. Donny presents what Harley-Davidson has to say through the myriad of service bulletins back in the day in everyday language. He also uses his extensive practical experience to constructively critique the official line, offers additional hard-earned information, and then shares what he does to his own bikes. He provides - solutions to fix the Shovelhead's teething problems; - Harley's responses to ongoing problematic aspects of vibration, as well as the aftermarket's cures; - tips on working with the Shovelhead's carburetors and five ignitions; starter and charging systems, electrical switches, circuit breakers, and relays; and - best practices for lubrication, as well as the progression of front forks and shocks, brakes, wheels, and tires. Written in straightforward language, this guide offers step-by-step instructions to help all levels of enthusiasts, from novices to expert mechanics. In his usual forthright manner, Donny makes technical issues understandable, interspersing explanations with entertaining stories about the lifestyle that comes with being a Harley rider.

Donny Petersen has been educating motorcycle enthusiasts about Harley-Davidson bikes for years. Now, he has combined all his knowledge into a twelve-volume series masterpiece and this third book is one that every rider will treasure.

Petersen, who has studied privately with Harley-Davidson engineers and has spent thirty-six years working on motorcycles, is sharing all of his secrets As the founder of Toronto's Heavy Duty Cycles in 1974, North America's premier motorcycle shop, the dean of motorcycle technology teaches about the theory, design, and mechanical aspects of Harleys. In this third volume, discover: How to identify the Evolution models Why the Evolution models are better Everything you need to know about engines Troubleshooting virtually everything And so much more Petersen provides workable solutions for whatever ails the 1984 to 2000 Evolution motorcycle. Graphics, pictures, and charts guide readers on a sure-footed journey to Harley happiness. It's all from a man who has ridden hundreds of Harleys across four continents - all while doing his own roadside repairs. He shares his expert knowledge and secrets in Donny's Unauthorized Technical Guide to Harley-Davidson, 1936 to Present.

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.

Donny Petersen offers workable solutions for whatever ails your 1999 to present Harley-Davidson. Graphics, pictures, and charts guide the reader on a sure-footed journey to a thorough H-D Twin Cam understanding.

Petersen's insight makes technical issues understandable even to the motorcycle novice. In easy-to-understand language, Donny examines what's right, what's wrong, what's "just okay" about the Twin Cam power train.

This is the first volume of Petersen's long-awaited "Donny's Unauthorized Technical Guide to Harley Davidson 1936-2008." This twelve-volume series by the dean of motorcycle technology will examine the theory, design, and practical aspects of his subject.

Donny has studied privately with Harley-Davidson engineers, plus, he's worked on Harleys for over 35 years, having founded Toronto's Heavy Duty Cycles in 1974, North America's premier motorcycle shop.

Having ridden hundreds of H-D Flatheads, Knuckleheads, Pans, Shovels, Evos, and Twin Cams across four continents-doing all of his own roadside repairs-Donny has acquired the practical knowledge what lets him share street-wise tips, as well as walk you through detailed service procedures like porting and polishing cylinder heads to performing simple maintenance like oil changes.

Donny Petersen is honored to share the wealth of his motorcycle knowledge and technical expertise.

Donny Petersen has been educating motorcycle enthusiasts about Harley-Davidson bikes for years. Now, he has combined all his knowledge into a twelve-volume series masterpiece and this third book is one that every rider will treasure.

Petersen, who has studied privately with Harley-Davidson engineers and has spent thirty-six years working on motorcycles, is sharing all of his secrets As the founder of Toronto's Heavy Duty Cycles in 1974, North America's premier motorcycle shop, the dean of motorcycle technology teaches about the theory, design, and mechanical aspects of Harleys. In this third volume, discover: How to identify the Evolution models Why the Evolution models are better Everything you need to know about engines Troubleshooting virtually everything And so much more Petersen provides workable solutions for whatever ails the 1984 to 2000 Evolution motorcycle. Graphics, pictures, and charts guide readers on a sure-footed journey to Harley happiness. It's all from a man who has ridden hundreds of Harleys across four continents - all while doing his own roadside repairs. He shares his expert knowledge and secrets in Donny's Unauthorized Technical Guide to Harley-Davidson, 1936 to Present.

In this second part of his fifth volume on Harley-Davidsons motorcycles, Donny Petersen, who studied privately with Harley-Davidson engineers, shares practical knowledge and streetwise tips on the Shovelhead motorcycle. Donny presents what Harley-Davidson has to say through the myriad of service bulletins back in the day in everyday language. He also uses his extensive practical experience to constructively critique the official line, offers additional hard-earned information, and then shares what he does to his own bikes. He provides - solutions to fix the Shovelhead's teething problems; - Harley's responses to ongoing problematic aspects of vibration, as well as the aftermarket's cures; - tips on working with the Shovelhead's carburetors and five ignitions; starter and charging systems, electrical switches, circuit breakers, and relays; and - best practices for lubrication, as well as the progression of front forks and shocks, brakes, wheels, and tires. Written in straightforward language, this guide offers step-by-step instructions to help all levels of enthusiasts, from novices to expert mechanics. In his usual forthright manner, Donny makes technical issues understandable, interspersing explanations with entertaining stories about the lifestyle that comes with being a Harley rider.

Donny Petersen, who studied privately with Harley-Davidson engineers, shares practical knowledge and street-wise tips in the fifth volume of his unauthorized guide on the best motorcycle maker in the world.

Written in straightforward language, this guide can help even a motorcycle novice to become an expert mechanic by following Donny's step-by-step instructions. Whether you're looking for detailed service procedures such as fitting engine bearings or simple tips on maintenance, Donny is eager to share the expertise he's stockpiled on the Shovelhead over the last forty years.

Donny shares real stories so you can find solutions to whatever is ailing your Shovelhead. Resolve teething problems, troubleshoot problematic aspects of the engine, and fix whatever comes up with various models.

Gear ratios, torque multiplication, and H-D and aftermarket tools of the day are prominent in the guide, which even includes information on tools Donny invented himself to make your life easier. Get the specifications for tightening all the Shovelhead fasteners and adjustments to mechanisms on various bikes.

In his usual forthright manner, Donny makes technical issues understandable, interspersing explanations with entertaining stories about the hard core lifestyle that comes with being a Harley rider.

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.

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.

Donny Petersen offers workable solutions for whatever ails your 1999 to present Harley-Davidson. Graphics, pictures, and charts guide the reader on a sure-footed journey to a thorough H-D Twin Cam understanding.

Petersen's insight makes technical issues understandable even to the motorcycle novice. In easy-to-understand language, Donny examines what's right, what's wrong, what's "just okay" about the Twin Cam power train.

This is the first volume of Petersen's long-awaited "Donny's Unauthorized Technical Guide to Harley Davidson 1936-2008." This twelve-volume series by the dean of motorcycle technology will examine the theory, design, and practical aspects of his subject.

Donny has studied privately with Harley-Davidson engineers, plus, he's worked on Harleys for over 35 years, having founded Toronto's Heavy Duty Cycles in 1974, North America's premier motorcycle shop.

Having ridden hundreds of H-D Flatheads, Knuckleheads, Pans, Shovels, Evos, and Twin Cams across four continents-doing all of his own roadside repairs-Donny has acquired the practical knowledge what lets him share street-wise tips, as well as walk you through detailed service procedures like porting and polishing cylinder heads to performing simple maintenance like oil changes.

Donny Petersen is honored to share the wealth of his motorcycle knowledge and technical expertise.