I have this because I don't have a magnetic tank. Love it even fits a small half face helmet easy to mount and remove, expandable. It doesn't really get in the way for me, it actually helps when it's a bit cold and windy.
No worries about the scratches
http://www.givi.ca/en/sacs_detail.php?sac=84
No worries about the scratches
http://www.givi.ca/en/sacs_detail.php?sac=84