Maybe if I'd have put it this way you girls wouldn't have so much sand in your vaginas:
It's difficult to estimate how much a CT distorts when it leans, and it will depend on inflation levels, but I doubt the sidewall squashes down by 2-2.5" (unless it's dangerously underinflated) so it would be reasonable to assume that its rolling circumference in a corner would remain closer to what it would be when vertical, therefore throwing the relationship between front and rear out significantly in corners. I would imagine this could interfere with the ABS if the tyre sizes are too far from stock size. With the 225 rear, a 140 front would JUST be within reasonable bounds. Personally, if you're a fastish rider and like to push the bike through corners, I'd recommend sticking with a 150 unless you're going to also run a lower profile rear.