Yes, your cable o-ring may need to be replaced but older cables will also tend to leak from the cable’s casing. When this happens, it can be deceiving. This means replacing your cable. Also, be sure that it is not leaking from your shifter shaft seal. I’m not sure if that is what You meant by “quad seal”.
Feedback: I think you are right, it could very well be the cable leaking from the end, I did pick up an “O” ring just in case, by quad seal I am meaning clutch inspection cover seal which I don’t think it would cause the leak. I’ll try to see what is going on my next service which I have moved up 1k mi., been doing 3k now going to 4k…
This just in:
I was just reviewing some of your solutions to problems a d on the problem of leaking oil from the clutch cable area on the Sportster and I discovered a other possible cause for leakage. I discovered that mud bees plugged the transmission vent on my wife’s 2007 Sportster. Oil was being forced up the cable and leaking down the cable from the adjuster nut area and running down the cable and dripping off near the case. After cleaning out the mud bee obstruction and cleaning the oil mess, no more oil leak. – Richard T.