You can see the offset mounts in the bottom two photos, one of the reasons it took me so long to make them work. Like Hunnybunny, I have a thing for symmetry. And, obviously, it's not Minnie. This 900 was on the bench for other work, and I had tried previously fitting the Danmoto Jisu muffler set I have to it, ending in dismal failure. The aluminium swingarm this M900S (98 I think) has is 15mm wider overall than the M600 steel swingarm, and I just couldn't get the Jisu mufflers to go anywhere near clearing.
There's a video at the end. They're louder in real life (or is my laptop just too quiet, maybe it's a conceptual thing). After riding and standing next to it, I'd put them at the higher end of the open muffler range I would think.
It's good to see them fitted. It was a fair bit of agro to get this far, especially getting the muffler pipes made up. Maybe only a bend and two flares, but getting people to understand what you want can be hard some times.
And then, of course, I started thinking about maybe using some much shorter muffler pipes and mounting the mufflers further forward. Next time.