Regardless of design intention, there's nothing saying that a Gold Wing can't hit the track and a CBR can't tour the country. In fact, some riders find a thrill in doing the opposite of what their bike is intended to do. By testing the limitations of their machine, they test their own limits. For other riders, it's not about testing themselves or having something to brag about down at the local dealership. It's merely a necessity. If they've only got one bike and they want to sample the broad spectrum of the motorcycling experience, their bike's going to be pushed to do it all. In that light, it's a particularly admirable pursuit.