Race Tech's Motorcycle Suspension Bible : Dirt, Street, and Track, Paperback by Thede, Paul; Parks, Lee, ISBN 0760331405, ISBN-13 9780760331408, Like New Used, Free shipping in the US

Helps with the art and science of suspension tuning in bikes. This book explains the three forces of suspension to make an assessment of the state of your suspension and provides thorough testing procedures that gauge how well you are improving the suspension and your riding ability.