Some examples of the former….
Design house Kardesign took four classic sport bikes and virtually accomplished some subtle design updates to bring them into today's aesthetic. Here's their take on the iconic VFR750R. I can't say that I find much wrong with the original, with the exception of the odd shaped fuel tank and the pale shade of blue, both of which are artfully dealt with here.
Here's a great photo of the RC30's V4.
Well, here's something completely different. Someone went to a lot of effort to accomplish this display.
RC30 not exotic for you? How about the oval-piston NR 750? Here's a couple of images showing the fascinating hardware at the heart of the beast.