They really are simple to remove, passenger side bar weight off first, roll back the end of the grip to expose the holes. Press in on tabs and slide out. Throttle side is slightly more work. Remove weight, roll back grip. Measure distance from bar end to hole on passenger side, measure same distance in on throttle grip. Guess where hole 'should' be. Drill 1/4" hole through the plastic grip only, roll the throttle to reveal the tab, push in and remove. Grip covers the hole when you are through.