and discovered the grips I’d made had apparently either dried a bit or I’d gotten a touch sloppy on the holes; they’re shifting a bit under pressure. Here’s my fix. Note: I started this before son gave a hand with the bike and we discovered The Awful Truth; I shall finish this before I start drinking.
In this case it’s easy. The grip frame is flat on the sides, so no inletting;
instead there are two pins sticking out on each side and corresponding holes in the grips. So we move to our old friend JB Weld.
(Yes, I know; both the damn caps cracked and leaked)
It’s a two-part epoxy that’s very handy for a whole lot of things. I’ve seen it used to bed a receiver into a stock, repair wood and plastic and -as here- tighten up the fit of grips that are worn, damaged or not made quite right.
Make sure the grips are clean and dry, no oil or grease in the areas the JB will go. The frame, on the other hand, you don’t have to be picky as you very much do NOT want the stuff to grab there. What I usually use for resist is paste wax. Yeah, the old furniture polish(Johnson in this case, as I still have most of a can). Wipe the frame clean, then wipe a light coat of wax onto the pins and the area immediately around them. Don’t worry about getting it spread too far; it’ll clean off later and better too much area covered than too little.
When the wax has dried, mix up the JB. For something like this I like to let it sit a few minutes to thicken up. Unless you use the fast-set stuff, you’ve got at least 15 minutes before it starts setting enough to be a problem(it does depend on temperature, if it’s warm it cures faster). Mix 50/50, close as you can, then while it’s sitting make damn sure you have wax over all frame surfaces it might get on*, then put a dab in the holes on the grips; it doesn't take much for this. I used a toothpick to load it in.
Then carefully press the grips into place, snug down the grip screw, and leave it alone for about four to six hours(again, time varies with temp). At that point you should be able to pull the screw, then carefully lift the grips off without messing up the fit. All looks well, put them back on and leave overnight to fully cure, and that’s it.
*If you do not have wax on the areas needed, or you use too much JB and it spreads out, you have a problem. That’s one reason for pulling the grips at 4-6 hours, if the stuff is grabbing where you don’t want it to you may be able to break the connection then. If you leave it and it fully cures, you’d better like the fit because the grips aren’t coming off.
Yes, there are a couple of ways to get them off; they stand a fair(near certain) chance of damaging the grips, so best not to have to try.
By the way, if you mix epoxy and such a lot, you might consider getting some of these:
You mix the epoxy on the top sheet, do your stuff and then just tear the top sheet off, leaving a clean surface for the next mix. I’m on the last pad of a set I bought years ago.