I had a Greenfield on my 520. Didn't like it, as it was too far back, and when loaded, the bike had a tendency to fall over sometimes, even though you do your best to properly position your bike to avoid the tip over. I then put on a double kickstand, which works great. It's been on there for nearly 3 years. I put rubber from an inner tube to keep from marring the frame (custom paint job) and it's never been an issue. Don't over tighten. Had I had enough forethought (experience) I would have noticed that there was no plate to mount a kickstand to and then I could have added it before the paint. Too late, next time! The double kickstand does add 2+ pounds though.