[locoblanco]

(eg. what locoblanco said about the actuator being installed in its outer housing 180° out)

The 2nd photo in Brockie's post #6 shows the clutch release mechanism. The diamond shaped plate is held on by two bolts, top and bottom. When it is removed you will note that the adjusting screw and locknut, (parts 3 and 4), are threaded into the inner portion, which is the worm gear, a cylinder with three grooves wrapped helically around the circumference. They correspond to the grooves inside the outer piece, with a sleeve of tiny ball bearings riding in those grooves. Some grease there every now and then will greatly smooth out the clutch operation, but be very careful rotating the two sections apart. Those ball bearings can get away from you, and are very difficult to deal with.

If it has never been apart before, and the problem is recent, there is no reason to think its presently assembled wrong, but if you take it apart it can go back together 2 ways.

 

[Brockie]

Just take your time. Once the countershaft cover is off clean down the area with solvent and a small paintbrush - or even petrol, with lots of old newspaper under the bike and maybe an oil drain tray or similar.

When you unbolt and remove the actuator be careful not to pull the clutch actuator rod out of the engine.
As OM28 suggests take the actuator to a rag covered work area before fiddling with it.