Regarding comments about "Luddites", all I can say is,
"I resemble that remark!"
However, I have had the opportunity to see quite a number of photos of the UCE engine cases from various angles, with covers off and cases split. And I can say that the internals are quite similar in layout as the earlier Bullets. It's not really as different inside, as the outside seems to appear.
Crank, cams, and lifters, all are in their traditional places, and may even use similar/same parts, but I don't know for sure. The case looks like a nice pressure-casting with good strong webs and construction. There is an oil-pressure gallery to the location of the lifters, which allow the hydraulic lifters to get their oil pressure.
I have heard a rumor that the internals of the 5-speed gearbox have just been moved inside the UCE unit case, and will share parts with the present 5-speed gearbox.
I't's almost like they just combined the engine case and gearbox case into the same case, and made a few upgrades on the basic engine design, and then radically changed the external appearance.
To me, it looked more "familiar" on the inside, than it does on the outside.
I can't say I'm totally "wild" about the external appearance of it, but it may "grow on me" as time goes by.
Of course, I'm a "Luddite", so that's to be expected!
Ace