Download or read book Motorcycle Dual Sporting (Vol. 2) - Dual Sporters & Thumper Humpers (Single Cylinder Motorcycling) written by Backroad Bob and published by Backroad Bob. This book was released on 2010-06-22 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Twenty-nine previously published magazine articles from the Backroad Bob's Motorcycle Adventures - Dual Sporters and Thumper Humpers CD. Nineteen stories compiled from fifteen years and 43,000 miles of dual sporting and ten articles that take a look at Thumper Humpers - the endearing term used to describe the individualists that tour on their single-cylinder four stroke motorcycles.