You always see WD-40 come up on the lubrication threads. Some love it, some hate it, others say it isn't really a lubricant at all.
However, I know a use for WD-40 that works for sure; handle grip removal and placement.
IF you have a hard time getting your handlegrips off, wedge a screw driver between the handlebar and the grip. Spray some WD-40. Hold onto the grip and twist it back and forth. As the WD-40 works its way under the grip, it will loosen nicely and come off.
THEN, when you put on your new grip on, spray a little WD-40 onto the handle bar and the new grip will slip right on. By the next day, the WD-40 is gone and the grip is on solid. This part is baffling because I thought that the WS-40 would leave a thin layer of lubricant that would make the grips come off, but it instead, the grips are on SOLID. An old timer showed me this trick and I have used it ever since.