Hi , I'm trying to figure out how to set the clutch arm further back . I know that I can adjust the screw and nut but I want to set the part that the clutch cable attaches to further back as it just moves freely and according to photos Irma should be further back ... any ideas ? Lobito mk4 

You can fit the arm to the next position on the spline

This one doesn't go onto a spline on the top of the clutch cover  . It is underneath and is directly onto the spiral . 

In that case you could use a thinner gasket for the magneto cover or use a slightly longer pushrod or shorten the pushrod by just less than a ball diameter and use two balls