KAK, I've done a few high speed runs since and all I can get outta of it is a little over 10700 RPM. Seems like I use to get a little faster (pull rev limiter)in 6th gear. I think it has everything to do with not having the fairings on it and "wind resistance" than ram air induction. I've put my hand in front of one of the tubes at about 110 before and there is a lot of air being "rammed" into those tubes at speed. I've also blocked off all the little holes inside the frame "air box" area.
Did you know there are little holes in the air box frame area? There is. I really don't think my engine is lacking air flow or ram air pressure, but I do think I am pushing a hell of a lot of air without the fairings.
fairings move a lot of air out of the way.........
2013 ZX-10, ECU flashed with race fuel and ignition maps installed, 1 lb lithium battery, Graves exhaust, BST wheels, Ohlins, 385 lb.s total, with 186hp on rear wheel, fun little motorcycle