If you want to get picky you could say the F430 uses a Maserati engine as the Maser was the first to use that block, chain cam drive, and four-valve heads.
FWIW, I don't know why anyone really cares about where something comes from if it isn't political in nature. I feel a certain pull to buy American, but never really do in practice. Otherwise foreign is foreign. The 1125r is the first and only Buell I would ever consider buying, but it is still pretty weird and quirky. If BMW can decide to build a conventional superbike for reasonable money, I don't see why Harley/Buell cannot.
I suppose if the company is American-owned that would be the next best thing. In that case the sportbike for flag-wavers is MV Agusta
I am actually surprised the Benelli hasn't went for more production of parts in China after being purchased. If they could sell a Tornado for say, $9999 being made in China, it would sell well. Otherwise it will always remain a boutique brand with about 20 dealers in the US and puny sales.