1911 brings up a good point that we all face soon as we strap a camera on a bike, the vibrations! Nice videos by the way.
Anytime a hard mount is placed to the frame or hard part connected to the frame we are going to pickup engine vibrations. In camera stabilization or stabilization applied during post production doesn't do well to eliminate the annoying mini vibrations the camera will pickup from hard mounting. Camera optical stabilization and post NLE stabilization works well to eliminate the road roughness and wind whip. Although helmet mounts aren't the best in my opinion, our body does well to insulate from engine vibrations. Some bikes, on some places of the plastic fairing does well to reduce engine vibration, but it's a matter of finding the plastic that is soft mounted and has a place for a stick-on or suction mount. Using rubber grommets (like 1911 v2 mount) or springs can help. Some bikes just like to transfer vibration more than others.
Then there is the location to mount that provides the perspective that we like to provide a view we find pleasing. Tank mounts that show the instrument cluster and shoot through the wind screen on some bikes looks pretty good and others it just doesn't work out. A lot of things to consider both video wise and safety wise. For post production stabilization there are some tools available to help and of course it depends on the NLE being used, or finding a plugin, or using a stand alone application. ProDad offers Mercalli 4+ in both a plugin for popular NLE's, as well as, a stand alone version. Vegas Pro 16 has a pretty good built in stabilizer FX and there are plug-ins available such as Happy Otter Tools. DaVinci Resolve 15 has an excellent stabilization and is available in full studio version or a public beta that is free. And there are many more, some are excellent and others are just barely OK.