One inspirational story is of Ted Simon, who, in 1974 aged 43, ventured on a four year journey around the world covering 64,000 miles through 45 countries on a 500cc Triumph Tiger. A truly impressive feat that was undoubtedly life changing. The book "Jupiters Travels" recounts his adventures and the people he met on his journey.
Two decades later, aged 70, he then retraced his route, this time on a BMW, to see how the world had changed. Truly Impressive.