Piero:
Stator: 47204
Rotor: 54213901
Rotor Spacer: 23738
Rotor Washer: 19147
Rotor Nut: 20692
I do not have a diagram to show placement of sprocket, spacer, rotor, rotor washer and nut. I would guess it is in the order I have listed.
In my own Atlas, I do not have a spacer between the sprocket and rotor. I do not think it is critical, just align rotor to stator. That is, do not allow rotor to extend outside, or inside the stator.
Slick