Thanks guys - I didn't take the bottom one off, so I didn't see where it came from. I've done my CB550 more times than I care to remember and I'm sitting here scratching my head because the CB650 is ... well ... different.
I have the Clymer manual tonight, so I'll give this a shot tomorrow. Crazypj, I guess I have a good reason to go buy another tool

Funny, I grew up with my dads tools - he had EVERYTHING. Now I approach a problem and visualize which tool I need, then start cursing because I realize that I'm visualizing some tool that my dad has, 2000 miles away.