I'll readily admit to having a naturally skeptical bent. But for what it's worth, I think the bar end weights on the DL1000 are completely superfluous.
The handlebar posts are rubber mounted. The stock bars are flimsy and flexy. If anything, the bar end weights just exacerbate all that rubbery slop.
Before finding some bars I like, I had occasions while futzing about with bar risers to ride the bike without the silly bar end weights and really couldn't tell a difference at all regarding vibration, other than there was a little less of the flexi-flyer bouncing after every minor road groove or expansion joint.
I purely despise rubber mounted bars and weak, easily-bent handlebars. The well-balanced DL1K is not a Harley that needs all kinds of rubber isolators to insulate the rider from bone-shattering shakes. Nor is it a 1972 Honda CB450 that will tingle your nerves in 15 minutes of over 35 MPH.
I mounted some cross-braced aluminum bars and made some conical spacers out of relatively rigid nylon to replace the rubber cones in the bar mounts. The aluminum bars are wider than stock; about the same width as the stock bars plus the stock bar weights. Rather than cut the aluminum bars, I left off the bar weights.
The result is less vibration, not more. That is, it got rid of most of the rubbery oscillating flabadap that occurs with every minor road impact with the stock setup.
As for higher-frequency "buzz", there is no difference that I can discern. The DL1K engine just doesn't suffer from any significant amount of that to begin with. Certainly nothing that would tingle hands or put one's hands and wrists to sleep. And I am one not at all adverse to riding through a full tankful (200 miles or so) in one sitting.
I did go through a period of hand/wrist numbness before changing the bars, though. I have a right shoulder injury that was painfully aggrivated by this bike in stock configuration. But that is all a matter of bar position; it had nothing to do with vibration. I have the same problem on any bike before adjusting the bar position to my liking.
So I'm convinced the bar end weights on the V-Strom are nothing but cosmetic concession to fad, unless someone wants to justify them as sliders.