In looking at these pictures I do not understand why the exhaust pipe needs to be bent forward and then loop around back again. Seems needless bends, length weight. The place meant of the foot peg, brake or shifter seem far enough back so there would be not interference. Might it be a heat thing?
My guess, vote also be for the large wide tank thing is a combo radiator ducting, air box, with the fuel tank and battery under the seat and maybe further back like the F800s. The picture sure do make that tank/radiator thing wide...nearly as wide as the cylinders.
PS in the previous post I was not taking a shot at the GSA...just some fun at the parking lot ballerinas tip toeing around.