For future reference ….
Grab a wire coat hanger from the closet, the thicker the wire the better for stock rubber grips. You may need to find wire thin enough to fit in between the metal on the grip and the throttle sleeve / bar.
Cut to a length double that of the grip. File one end round as possible, no sharp edge is sufficient.
Insert between the grip and the bar / throttle sleeve and work it in to the hilt and pull back just a tad.
Bend the end sticking out to 90 deg.
With your hand on the grip squeezing with just enough pressure for the wire hanger to grip the rubber, spin the hanger you just bent with a free finger.
The wire will work itself around the inside of the grip separating the glue.
When you have all the glue unstuck between the two spray some LPS between the grip and the bar / sleeve with the hanger in place and remove the grip undamaged.
Best price I found for Grip Puppies ............
http://www.shop.shinhopples.com/ (foam grip covers)