Went through the whole thread looking for F650GS possibilities. The SO has both a twin, new, and single,old. The single is really ready for a new shock, and seems to sit a bit to low on the rear. Could also use fork springs. Can the back be raised a bit and what are the possibilites? The single is much easier for her to handle on dirt, and cuses less hand wringing when dropped.
motorcycles are like fly rods, you need way more than one.