I was putting the chain on my 550K when I noticed these little tabs here on the swingarm- the chain runs right in front of them, over the metal of the swing arm, and I was wondering if there was a chain protector that goes on there? I've often seen bikes with a piece of rubber or stiff plastic where the chain passes over the swingarm. I checked CMSNL, but I couldn't see any special part that goes to that. Does the 500/550 have a chain guard?