The clutch has failed on my 85 Low Glide several times over the years (I bought it new in '86). In my case, it was the clutch release finger that attaches to the shaft that attaches to the release lever. This is on the other end of the adjuster rods, behind the cover on the right side of the bike. The rod that goes through it is square, so the hole in the finder is square. It will crack from one of the corners when under load. The symptom will be continually having to adjust the cable until the finger finally cracks in half. I have replaced mine a minimum of 4 times over the years, and I think it failed again right at the end of last season.