A few things to consider before you take the irreversible step of removing the risers:
-are you using the euro/japanese stock clipons that mount above the top triple, and if so, have you already raised the fork tubes to check the handling?
-have you checked under the top triple where you will be drilling into to see if you will have room for a nut underneath, or if you will be drilling into a reinforcing web or anything?
-are you sure you never want to go back to bars? I would make a little plate to mount on the riser, and put a Yosh temp gauge or clock or GPS or something on it. It'll look fine and you can always go back to bars later if you don't like the clipons.
Steve