I just shaved 10mm from the throttle stop on the 01 WR. It was easy, I loosened the clamp between the head pipe and silencer and slid it foward. I unbolted the coil from the frame and slid that foward. I then pulled the coolant overflow out of the way. This left pleanty of room to get a 4mm hex head wrench in to remove the throttle stop screw. Use one of those hex wrenches that has a 90 degree bend and just make several small turns. I marked off 10mm w/a razor and cut it w/a hax saw.