Cable lube didn't work as expected. Does yours fully return?
I disconnected the clutch cable and shot lube down there over and over again. I then cleaned and replaced and adjusted it. However, it still doesn't do a full return.
On the right side, the clutch cable pulls a lever that has a small spring, that external spring doesn't have enough strength to pull the cable by itself. The cable must overcome the spring of the switch, the friction of the cable, etc... and it's not actually pulling the clutch lever all the way back.
Does your clutch lever actually go all the way back? If you look at the little lever on the other end, does that little spring actually pull the whole thing AFTER the clutch springs have lost tension? There's two springs, the internal clutch basket springs that are strong and the tiny weak one on the outside. It's the tiny weak one that's not pulling the cable back, maybe it's just supposed to remove tension from the throwout bearing so that it doesn't rub all the time.
There's no adjustment to the tiny spring, it's fixed, but I could find a stronger one if it's supposed to do a full pull in stead of just tension release.