Just curious. Why do you say that?DON'T!
Are you talking about securing the twist grip?
never drilled and never had any problems with it loose-
Did I knock off some little plastic part on it long ago? Are they still on there like that?
It's overkill-
Whenever I used the cheap plastic throttle, I'd drill a small hole in the bars where the nub would go......then drill through the plastic housing of the throttle (where the alignment nub is) and drive a sheet metal screw through the housing into the hole in the bars. Done deal....throttle stays put.
Did I mention that I ride at WOT alot? Thus the reason for securing the cheapo plastic junk throttle.