Take the sprocket cover off, and put a dab of grease where the clutch arm goes through it.... Also on the pivot that presses in on the pin. When yopu reassemble it, make sure you pull all the slack out of the cable and push all the freeplay out of the arm before you tighten the cable end. (it's easier with two sets of hands)

Run a few drops of light oil down the cable.

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If it ain't broke, and you mess with it long enough, it will be.