I pulled the rear shock to drill new lower mounting holes to lower the bike. While I have it off, I made some measurements.
The top and bottom mounts are BOTH secured with bolts that have 10mm center sections. The upper bushing is 22mm wide. It mounts just under, and in front of the battery cradle, behind the fuel tank. Both upper and lower bolts have M10-1.25 threads and locking nuts.
The distance between the upper and lower mounting positions is ~460mm (sorry about the poor photo, but the measurement is ~460mm).
The spring shows 350 pounds per inch rating.
I am waiting for a pair of 10mm high speed metal drill bits to make the new lower mounting position. I'll post photos after I drill them.