Originally Posted by kvr929rr
Why on earth would it be heavier.
Well, the liquid cooling system obviously weighs something. If those other engines made it to a liquid-cooled generation without gaining net weight, then they must have lost it elsewhere.
I'm skeptical that the BMW boxer engine has that much to lose. It already lost a good bit of weight between the 1150 and 1200 generations. The HP2 Enduro engine is a bit lighter still, but that was at the sacrifice of a counter balancer, so not as smooth.
But hey, I'm no engineer, and there's always room for more clever design. Regardless, the additional complexity is indisputable, and I am not interested in that.