The first thing I would like to say about these rearsets is to make sure you have access to a machine shop as the installation on a cb650 is not as simple as just bolting them on. You will need to make longer versions of the bolts that go through the foot-pegs and the swing arm. McMaster-Carr had the cheapest prices on M12 and M14 stock. Make sure you get 1045 bolt-grade steel. It is a little harder to cut threads into but it is going through a motor mount and the swing arm so it CANNOT break!
I also had to flip the rear brake upside down in order to get the brake actuator to line up with the new brake pedal. The petal return spring and brake light switch also had to be relocated in order to function properly.
Other than that I'm happy with them. They function smoothly and other than the previously mentioned issues, went on fairly painlessly. If you have clubmans, clip-ons, or otherwise low handlebars, they make long distance riding MUCH more comfortable. Plus they have the added bonus of looking good.
If you have any questions not answered here, feel free to PM me.