I left this guy at the confluence of the Marys River and the Willamette River in Corvallis, Oregon. This is one of the most magical places to be found in Oregon. Most rivers flow North to South but the Willamette flows South to North. Most rivers flow from inland to the sea but the Marys flows from the coast inland. So here you stand at the vortex of the uber unusual. And with an incompairable view.
If the motorbike follows the current, it will end up in the Columbia River which flows east to west and empties into the Pacific Ocean. From there, it can catch a fishing boat to San Diego in the hopes of catching a ride to Mexico and eventually South America. Good luck on your adventure!