The Big Twin High Performance Guide

Takes owners through the process of improving performance of big twin motorcycles, focusing on the 1340cc Evolution bikes from 1984 to the present, with tips for all big twins from 1966 on. Chapters describe simple modifications to improve reliability and daily performance, as well as how to build r

Donny is the Winner of the 2012 International Book Awards. 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.

Put a veteran mechanic on your bookshelf. From simple 15-minute jobs such as lubing cables and bolting on new air cleaners to more advanced tasks such as cam changes and swapping heads, this how-to guide offers carefully selected projects you can do in a weekend. Color photographs guide you step-by-step through each performance project. Explains why each project should be done and what performance gains you can expect.

Now more than ever, Subaru fanatics have a wealth of factory and aftermarket performance upgrades at their disposal. In High-Performance Subaru Builder's Guide, author Jeff Zurschmeide explains in detail the similarities and differences between the Subaru models, and describes how to modify each for performance on the street and at the track. He uses over 300 color photos to show you how to modify your Impreza, Legacy, WRX, or STI for improved acceleration, handling, braking, and style. The book provides detailed chapters explaining how to modify the intake, exhaust, turbocharger, and computer systems for more horsepower and torque--plus info on upgrading your drivetrain to handle all that power. If taking corners is your thing, you'll find chapters on the suspension, steering, chassis, brakes, and wheels and tires. A special chapter even shows you how to get started in your favorite type of racing, including examples of successful racers and their cars.

New in paperback! The Triumph Speed Twin & Thunderbird Bible reveals the definitive history of two of Triumph’s most popular motorcycles in the 40s and 50s. From development history to sporting achievements, this book is packed with detailed information – everything an owner or would-be owner of one these classic twins needs!