I wonder if you're talking about raking the frame or the triple trees via off-set cups? Each of these would at least slightly alter handling in separate ways by the effect each would have on trail. A bit of each is preferable when stretching out the front end,but that doubles an already overwhelming job.
Remember off-set cups,which wouldn't change handling much, sometimes require a longer stem because of the increased angle. I'm not sure with these bikes.
If you're just looking to slam your bike, I dropped my rear shocks 2" and my forks 2". Didn't have to change my kickstand, and my bike handles fantastic.
