The only one who can get a HT to NOT spit the dummy is you Sianelle !
One of the quality checks to do, is remove the ball bearing from where the clutch bucking bar is situated, (the clutch lever side, after you have removed the cover) and check the ball bearing for case hardness by atempting to scratch the surface of the ball bearing with a file. If the bearing is scratched by the file, then replace the bearing. Or replace it anway just to be sure.
You can also case harden the bucking bar with heat and cooling in engine oil, preferbly fosil based oils.
And do the same with the tip of the clutch lever where it cams/pushes the bucking bar.
So it's 3 things to check for case hardness,
Ball Bearing, Bucking bar and Clutch Lever tip at Bucking Bar end.
And finaly, where the lever rotates in the cover, that hole is missing a bush, preferbly brass oil absorbing bush, similar to what they use in automotive dynamo armatures, or used to.
Where they sell bearings, they sell those bushes and you may need to dremel out the hole in the cover to fit the bush, so the lever rod fits snugly inside the bush, eliminating unessecsary wear on the alloy cast cover.