11.5" Progressives on the rear will actually lower the back end about 2".
You don't "HAVE" to lower the front but, the engines sump will thank you if you do.
Actually lowering the front is very simple.
Method 1: loosen the upper and lower fork clamp bolts and slide the forks upward till the bike is level.
Method 2: Pull the top cap off of the forks, remove the metal spacer tube, get some PVC tubing the same size and cut it down till you get the front where you want it.
Keep in mind, method 2 will decrease the front fork up-down travel.
