Gus, I couldn't get the pic to come up that you posted in the link.
In any event, I don't know... If you're dragging that slider, you should have already hit your footpeg, and I don't know where your leg would fit...
Also, I don't know that you'll find any "shorter" slider to use or that a shorter one would do any good.
So, I guess I wouldn't personally consider removing my sliders. If I get to where I've got the bike cranked over that far, I'll be sure to post it.