1200 to 1400 cc inline triple is what I want.I don't even want to know the size of crank or rods required to spin a 1200cc twin to 8k rpm. I'm sure the vibration would beat the machine (and rider) to death in short order.
OEM turbos are just scratching the surface of what's possible, mostly limited by the crappy 91 octane fuel you get at the pump. It's amazing how much power a turbo 2-stroke can make on Avgas when you turn up the boost. If you got the wallet for barrels of VP Race Fuel they really make some power when pushed past 10lbs of boost.
But I would settle for a 1000 cc twin.
Riding an 800 Cat with just a 900 big bore was impressive. But the M1000 Cat with a 1200 big bore made me smile for an hour after getting off of it.
My guess is that the buyers of the 9R will before to long be able to buy big bore kits, which for me is part of the appeal.