Stator can move way more than a few degrees it’s more like 15° When transferred to the flywheel because degrees on the flywheel not on Stator
You could set timing with the point gap too so timing could be way advanced if the Point gap is big and full advanced Stator timing can be 35-40° or more before top dead center,
You got to get the gap down to 16 or 17 thou of a inch @ full open points, that’s with the flywheel top dead center or a bit past top dead center sometimes then set timing, since the bikes not running you’re gonna have to set it statically look up how to do that on wiki
Every Sachs I worked on was timed too high to begin with that was pretty much with a normal point gap
You also could have the flywheel on wrong or the wrong flywheel too Making the timing 100° or more off But you got to find top dead center and figure out what the timing is
This will show you how to find top dead center on bosch ignition