When I first test-rode the FJR a couple years ago, that was a huge disappointment for me. I could not imagine what sort of improvement the FZ1 mirrors might make.
So much for my lack of imagination -- it's like riding on a different bike!
I measured the distance between the outside edges of the FZ1 mirrors mounted on my FJR and it's just a couple inches less than the mirrors on my Wingabago. The FZ1 mirrors make the transition from one bike to the other a snap.
When I'm 'lane sharing' or filtering up to a traffic light, I just reach up with my left hand and fold the left mirror in until I'm where I need to be. Works like a charm.
Oh, and if you're concerned - like I was - that the single stalk on the FZ1 mirrors might be less stable and more prone to vibration or bumps than the stock mirrors (with two stalks supporting), don't be. That fabulous rear-visibility is crystal clear.