The K75 service schedule says to:
Renew the lining of the chain tensioning rail and chain guide every 36,000 miles.

I have 95,000 miles on my bike and I doubt if it has ever been renewed.
I can hear my chain rattle a little bit in first gear at 1700 rpm. Is this one of the symptoms of a worn guide?
Has anyone done this job theirselves? Is this an easy job to do yourself?

I'll read up on it in my Clymer.

Are these the 2 parts they are talking about renewing?
#12- Tension Strap
#16- Guide Rail