the turning radius of the Versys is a subject that gets some discussion occasionally. take a look at the clamps/forks when turned hard against the stops, any more movement and you get into interference issues in one or more locations. in terms of degrees, you might gain a few by shaving the tab, but i've looked at it a few times myself and decided it wasn't worth it.
the complications are easier to see with all the plastic out of the way, but the tank still on, although it's not on in the photo.
i'm now running KX450 clamps/forks, so a steering stop mod was necessary. the hubs on the dirt bike wheels are narrower than a typical cast wheel, so the centers of the clamps are closer than the OEM Versys clamps. without the new steering stop, the KX clamps and fork tubes hit the Versys frame and tank.
the new V649 scooter build goes back to OEM Versys clamps.