Hi Dobbo,
I've not tried mounting a camera on an R1200S, but it looks like it could be quite a challenge. I've mounted cameras to my bikes using the go-pro sticky mounts, a suction cup and various RAM ball solutions.
On the R1200S, I think the suction cup route is probably least likely to be successful, given that there are not large flat areas of fairing to place one. The sticky pads are certainly strong enough to hold a camera at speed, but they are fairly permanent and don't improve the look of the bike. It can also be hard to place them in such a way that you can mount the camera close to being level. RAM balls and arms are the most flexible, but finding places to mount one near the front of the bike could be challenging. Using a RAM ball on a U-bolt, or a "tough claw" you could attach the camera to your rear sub frame, and get some shots either facing backwards, or forwards.
If you are riding with others and want to film them, be aware that with the wide angle on the go-pro camera, if they are more than about 5 meters away from the camera, they will be tiny in the image.
The most obvious way to mount the camera would be a Go-Pro sticky mount on the windscreen. That would give you a good forward facing view, and also the option to point the camera at yourself.
I found that using Go-Pros was not that great though, because unless you keep swapping the position of the cameras to get different angles, you end up with hours of not very interesting footage. I switched to an
insta360 camera, which captures a full 360 degrees image, and allows you to re-frame the footage to give more dynamic shots, which look like you are moving the camera around. The other advantage is that they capture everything around you, so if something interesting happens, it will be possible to see it in the recorded footage. Here's an example of a
short video I captured using the insta360 to demonstrate that effect.
Cheers,
Paul