Benzina #1 all Ducatis are, "are XLCHs that don't vibrate, don't blow up, start, go fast, handle and stop". Frankly the design was already dated in prototype form and the project was binned, for Harley to do what they always do - put style over substance. The result was the cafe racer XLCR, a mean and moody looker, but no match for a Le Mans or 900SS. It bombed.
But that needn't have been the American way - in 1914 the US Condor motorcycle company built a successful board racer with a 1000cc V twin engine that used overhead desmodromic valve gear 40 years before Taglioni tried it at Mondial, again as per Benzina #1. More on that Mondial soon