Night rod...

V rods...

Harley partnered with Porsche to design this engine. It's hated by a lot of Harley purists since it's water cooled. Some folks don't even consider it a "real" HD. Personally, I think it's one of the best things they've done in a long time. The bikes take some getting used to, you either love it or hate it. The fuel tank is under the seat.
HD makes some good looking bikes, I wish they could do something with this one or at least offer this power plant in some different models. I'm generally not a fan of H2O engines, but I might consider this one. You can pick up a used VSRC for under $10k all day long around here...