I had a look at the Honda workshop book for my XBR500. It has a kickstart, in the same engine as the 650s, but different in detail.
My kickstart shaft has a cam to operate the decompressor which doesn't appear on your parts diagram.
But as navalarchitect said, the circlip is No. 13 in your diagram. (There are two circlips in that area on my bike, one to hold the decompressor cam in place).
There's another picture that may be useful if you don't have it or haven't noticed it.
There are a couple of punch marks on the shaft and the ratchet to ensure they go back in the right place:
But once again, in the absence of that decompressor cam, your bike may not have the punchmarks. The ratchet may not need to be in a particular place without the cam.
Hope that helps rather than confuses!
I'm wondering why you're rebuilding. I have the XBR and a Dominator (same engine again), and neither engine has ever had a spanner anywhere near it (except regular oil and filter changes), and the XBR has 80,000 miles, the Dominator about 40,000. They have a good reputation for longevity.
Take care with the reassembly.