First of all, you have to remove your barends, which is simple enough, just unsrew them at the end, and they fall off. Then you either have to slide the old grips off, or cut them off with a razor blade, if they are being stubborn. After the bare bars are showing, make sure that the throttle is not bound up by twising it and letting go a few times. It should snap back into closed position.
Then, and some may disagree with me but oh well, use a rag or paper towel soaked in gasolin to clean the old glue and old peices of grip off the bars. Gasoline will dissolve absolutely anything. Just make sure that after that is done, you wipe the bars again with a clean damp cloth to get the gas off.
After the bars are clean, cut a small hole in the end of your new grips so that the barends will fit, apply a SMALL amount of grip glue to the inside, and slide the grips on. Don't push them all the way on though. The left one is ok to push all the way on, but the throttle grip must be pushed up just shy of the starter switch housing so it doesn't stick. Also, make sure you don't get any glue between the plastic part of the throttle handle, and the metal below it.
(Shewwww, that was more typing than I thought it would be)
Good luck
