Originally Posted by Beezer
aaaaahhhhhhhh...... my rear wheel is a 16.
Interesting. The CX650 has identical-looking wheels but my rear is 15". Yeah, it's probably not really worth swapping if you have a 16" rear, since there is at least some selection of DS tires in that size.
Edit: Apparently the CX650 has a different final drive than the GL650. Seems like maybe you can use the Comstars from the 500s? The drive splines appear to be the same, but the bearings are different. You'd have to find bearings that have the same OD as the 500 bearings but the same ID (17mm i believe) as the 650 bearings.