Sportster/Buell Engine Hop-Up Guide: Harley-DavidsonFrom four speed Evos to five speed Buells, this book is the Bible for Sportster performance. Whether your intent is to improve the existing factory parts or install something from the aftermarket, author Kip Woodring explains not just which parts to buy, but why. Fourteen chapters cover: History, Planning, Exhaust, Induction, Ignition, Charging and Starting, Gearing, Valvetrain, Cams, Heads, Cylinders and Pistons, Flywheels, Oil, Transmissions and