The point of all of the effort to date on the 1981 Suzuki GS650 was to be able to split the cases to remove and replace the broken rear cam chain guide that is pinned between the two halves of the crankcase. With the oil pan removed it is now time to remove all of the remaining bolts that are holding the two crankcase halves together.
Again, the manual indicates that a mallet might be able to separate the two halves of the crankcase. This must only work when the engine is brand new since there are four alignment pins between the cases and there is no way you are going to tap the side of the crankcase and get it to release vertically. To solve this issue, I purchased the official Suzuki tool to split the crankcases. $60 well spent.
Then it is just a matter of lifting the lower case off of the upper case.
The slot that the rear cam chain guide is fit into can be seen here:
And removed along with upper half that was previously loose within the cam chain cavity.
So other than putting everything back together to have a running motorcycle engine again, removal of the broken rear cam chain guide has been achieved. The question now is how much more work do I want to do now to clean up the engine before it all goes back together?