It's a no-go on the OEM bars. I had to keep them. Bought a Pro Taper, Windham RM Mid, while the overall width is only 1 inch narrower than stock. However, the bar ends are only 8" compared to 10" for the stockers. So the controls don't fit. I have these exact bars on my WR250R and they fit me and that bike just right, but I cannot use them on the XT1200Z. Unfortunately, I already drilled a couple of locating holes and ground down the left side knurls to accept the Oxford heated grips (Adventure size), so I can't return the bars. I guess if I ever bork my 250's bars, I'll have a backup.
On the bright side, the heated grips are installed and work well. Lot's of wires involved.