I just purchased a 2001 sporster custom 1200. I know it is not a rubber mounted engine but I was wondering if it is normal when I look in my mirriors going 50mph that I literaly can not see anything behind me except a swirl of whatever it is that could be behind me (car, road, ect..) let me know if this is normal or if I maybe need new mirrors that are more stable ? Thanks for the help