A Mag will ONLY power the ignition it self, It will not run any lights or other accessories. So with a mag you still have to have a charging system. Why not just run points off of a PMA? You already have the PMA and point are about $35 and require no CDI/TCI box, only a small capacitor. The mounting location for a mag on an XS is problematic as its right in the way of your knee unless you have rearsets.