Thanks for the quick responses!
At first I thought it was the crown of the road, but I've tested several scenario's based on the camber/crown of the road. Pretty much takes a strong side wind to keep my bike going straight.
I used a Motion Pro alignment tool to check to ensure that the rear was aligned properly....and the dots on the rear stops definitely are not correct. I think I'll recheck the alignment on front and rear again.
The weight of the muffler seems to make a lot of sense. The stock can is pretty damn heavy hanging of the right side of the bike. May have a new/lighter can in my future