apparently, wearing a rubber on the peg is an "upgrade", as the dark is a basic minimalist set-up. it may be so that your boots don't slip on them. I've had my foot slip off the pegs when riding over fairly bumpy terrain. (read: NOT dual-sporting on the monster... just riding over crappy road surfaces).
After I saw your post with the pic above I had to give it a shot. I just finished my pegs tonight & installed them back on my Monster. They look great! I think this is an upgrade vs. the rubber covered ones.
Anyway, thanx for the great idea. It was pretty easy to get the rubber off after soaking in some Goof Off then just used the wire wheel on the ole' Dremel and wala beautiful pegs.