Yep, Insta360 One X2.
I used to do the same on track days. The problem is that you can't get the camera far enough away to capture the entire bike:
With the invisible selfie stick, it lets you get some distance between the cam and bike.
Yeah, was fooling around with the camera between lessons today:
Interestingly enough, the stitch lines are visible when the camera pans around the U-turns. Also, the stabilization seems to focus more on the background than the bike on the rear-mounted position. Gotta play around with it a bit more to learn all the idiosyncrasies.