I made the cam and the arm. The cam ws made from the grade 8 bolt. That actuator arm is considerably longer than the stock clutch actuator - almost an inch. It's simple 1/4"-20 eyebolt. With my Dremel tool, I notched out 6 slots iside the eye of the eyebolt to match up with the 6 corners of the nut, and very carefully ground down the flat parts in between. Leaving things too tight, I hammered the nut into the eye and it is locked in. No way that is gonna move.
The nut threads down onto the bolt/cam as far as possible and you can see it is locked in with another grade 8 nut. Both nuts are frozen with Red locktite - so no way they are moving. Used the dremel to drill out a hole in the bolt just big enough to fir the clutch cable through.
To me, this is a big part of what makes motorbiking fun. Little improvements go a long way!