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After designing a few possible solutions I gave up and just bought two spring struts.
Works perfect!
Let the tweaking begin!

After testing more in depth I'm finding some issues with the leaning. The design leaves the two front motors in charge of that, and when leaning hard one goes all the way up and the other one all the way down. The one going up has to lift everything, and it takes a lot of time. So it will need some attention. Or I need to lose 20-30kg. Or both.

Would be really appreciated if someone could help me here 🙏🏻

Start your own thread with this, it really doesn't have anything to to with MaxHUD.

Thank you so much guys!

Had some time to play around with it a little more tonight after fixing stuff with the motion plugin.
It's marvelous...

A cheesy teaser:

Tested a few days back, but it turns out my outlets in the basement didn't have enough oumph.

So I pulled in three phases 16Amps each now, that should do it! A little bit hesitant to plug it in though.. These cables are massive 

Thanks! Haven't had any time other than assembling it since it got home so my fingers are itching to get started!

Version 8.0.4 is supposed to fix the auto swap!

Definitely more distinct on some than others. CBR1000RR, quite distinct, RGV, reasonably distinct, 748R not much at all, SV1000 not much either. Do you have an email address, I could send you an STL if you like. Cable driven, hall effect sensor.

Next up is the gear shift. All the bikes have that distinct feeling of metal moving and notching into place, I want that. I've been working the various levers with my eyes closed trying to come up with what might replicate that, but no great ideas so far. I know I want a detent to click through, and the other thing is I want the detent tension to be load (engine load) sensitive. I want to be able to preload the lever like I would on a real bike, then back off the gas to let it snick into the next gear, like you would on a bike without a shift lever. Keen to hear any thoughts you might have on that. I think it can be done by the Arduino handling the TPS input, rather than having to receive telemetry via SimHub or whatever.

@mdlp Yes I know what you mean, replicate that 'chonk' as you click into first. The bike itself doesn't move (although I understand why that's probably not a bad way to replicate it, it uses existing mechanics you already paid for!), so I was thinking maybe a servo that lets a weight swing and hit a stop. That will require telemetry though, to know which gear you're in.

I'm quite keen to build a motion rig at some point, but I want to pick off all this low hanging 'immersion' fruit first.

The low hanging immersion is the complex bit. I'd start with motion and take it from there.
The rabbit hole is nice and deep!

Simhub shaker speakers does a good job of replicating gear clonk.

If I had a motion rig (if that's not a phrase that leads to trouble I don't know what is), I'd be tempted to have it a slightly lowered at the front at rest, with the clutch bite point reverting to level to simulate drive take-up.
Which may be ambitious as I don't know what telemetry data is available.

Front suspension travel does a good job of communicating acceleration on the prototype, so as soon as that works on the big rig I hope it will be enough.

I tried out all our motorcycles at home and the tipping point was surprisingly absent. The action is not linear though but the difference was not big enough for me to design something to solve it.
I just went with springs. My thought is to put a vibration motor in the handle and simulate bite point that way instead.

I just ended up buying a domino throttle real cheap from a friend at RGNT motorcycles. The most difficult part for me was getting a spring that works good and feels right.

Thanks!
I got them from SimuKit in Belgium. I believe he buys directly from the Chinese supplier, sunrise motors.
They are not very good. Leaking and looots of backlash, I'll look for something different next time.

That's a whole lot of lean! It'll be a good workout for both motors and rider.

I find the yaw acceleration does a pretty good job:

Bought a domino e-throttle and put back the bicycle levers yesterday. They have a more solid feel. So back to wire and normal load cell for the brakes. Also made new circuit boards for the controller mcu and a small one for the rear brake amplifier. Getting close to assemble again.

Can't wait to try the new motion profile!