On my FZR1000 I used some aluminum blocks under the OEM mounting points to space the mirrors out a bit, making it easier for me to see what's happening behind me. For the VMax, I like the OEM mirrors, perhaps placing me in a minority. I find myself moving slightly to one side so I get a better view of what's behind me, when I need to check on traffic to the rear. Adding a short extension would probably help, but the reverse-thread on one side makes it more of a search for something matching the application for height extenders. I don't care for the handlebar-end mirrors.