Ron Fellowes rode a 1910 FN Four Cylinder motorcycle, by himself with no chase truck, from Nepal to Belgium ! Yes, by himself, and he was in his 70's when he did it. He first flew his bike from Australi, then did the ride. Check my sidebar for a link to his site....oldblokeonabike.com
Just flat out amazing. I had almost forgotten about this.
The Cannonball is pretty cool, but to do it by yourself...why that's a whole other deal.