To be fair @kye I was answering @leslie question about what it was he had seen.
And also saying that it would not be sufficient to cope with that amount of movement you are describing which by extension would not be able to protect the camera.
Back in the mists of time when dinosaurs and DJI Phantoms without integrated cameras roamed the earth, we all used a product called MoonGel to try and offset the vibrations coursing through the direct mount to the GoPro.
MoonGel was originally a dampening solution for drums and when placed between the drone and the mount was quite effective in reducing the jellovision produced by the GoPro getting vibrated to within an inch of its life during flight.
If you are fashioning/modifying a mount for the scooter then you might want to look at incorporating a similar solution to reduce the vibration transmitted to the camera.
With regard to the GX85, the big danger will come if you ride along without the camera being powered at any point as without power the sensor will be left to flop about which will potentially cause a problem.
Worth remembering that the GH5s came about in large part, apparently, because shows such as Top Gear wanted an IBIS-free version of the GH5 to deal with the vibration issues shooting in cars causing a problem with the image of the IBIS version so if you have got a non-IBIS camera then I would probably look at that as an option.