yes is would which underlines the importance no?!
Years ago I could have had a go at this but its too long ago to remember formulas now, it’s critical with ships and boats to make them stable and not want to roll over (they have a centre of buoyancy) but I think you are meaning the centre of mass, which is not the same as the C of G, especially in an awkward object that moves and has mass that changes (eg as the petrol tank empties and riders of different weight and height get on & off. Anyhow, I expect the C of M will be somewhere close to crank shaft height (from the floor) and yes will vary by a few mm depending upon the bodywork & height of the various models. Not sure it’s going to keep anyone awake at night but there will be a boffin in BMW that has it all worked out. My fag packet sketch above pins my guesstimate. The red dot. It will be low though compared to very many bikes and be on par with the GW, at or below knee height. It’s why it feels so stable upright but wants to drop away at that ‘ooh-err’ lean angle you don’t want to reach before it’s too late and goes down.
It will hardly have an effect:
