Rob, I had the same problem with mine. When I took it apart I couldn't believe that the main bolt holding the BDL in was only hand tight.
The bike was running fine and shifting better then ever. The only thing that made me take the primary cover off was the god awful knocking noise I heard.
When I get it all back together I have to make sure that I torque it as the manual says. 100 ft. lbs. back off one full turn then re torque to 140 ft. lbs.
Hope this works for us.
Nothing else matters!