Shamelessly stolen (with comments) from a BMW forum (no BMW content though) The inverted triple... Nothing like putting the "heavy bits" up high. The dry sump suction pumps better never quit either. It would be a "cool running engine" in the rain and a bash plate might be "rather necessary" Then there is the "single crank pin V8" Yes, the crank shaft has only ONE pin for V8 action. Plus 4 pivot pins. Be sure to listen to the video of the 125cc I-4 built the same way. VERY cool sound. Then there is the "uniquely" supercharged Ducati 500 cc single. it makes "more power than stock." Lastly, there is always the COOL sound of a V12 engine. IN A BIKE too!!!