Power issue?

Thanks all! After a quick TPS dealer mode check (at normal engine temp) I think this is the culprit. It's sitting at the low position at idling and not moving to the middle until around 1800rpm, then not to high until over 4000rpm. There's a weird fluctuating behaviour too, sitting with the throttle as still as I can possibly keep it, there are times when it will swing over a 400rpm range up and down. This doesn't seem healthy and not something I've ever noticed before. My theory is the TPS is just ** and needs replacing. Unless anyone has any other theories that might explain both? As far as I'm aware, there's nothing else that would cause the TPS check to report LOW at idle, other than the TPS being out of adjustment? (except maybe ECU buggered too).

here's a little vid of me trying various throttle positions. If I'm not gradually climbing or dropping the revs, I'm holding it stock still, so you can get an idea of the scale of fluctuation at different positions. It seems to be worse at higher RPMs, which tracks if the TPS is out by a percentage, it would scale?


EDIT: Also, since there's also the Secondary TPS, if I do replace it, do I need to replace that too? what does it even do, if the primary is broken does it just take over, could that be why it's now out of alignment?

EDIT2.0: I managed to find some Torx alan keys and adjusted the TPS slightly. it's now in the middle at idle and at the top about 1700rpm ish. It is far better now, idling more reliably and I took it out for a ride, much better throttle response and not bogging as much. There's still a big issue though. It just occasionally bogs hard and struggles to pick up, seems to be when it's under load. Pulling off or in 3rd at lower revs, just feels like it's really struggling and ends up knocking and firing very oddly.

The RPM fluctuation hasn't diminished at all either, some very wild swings when holding the throttle perfectly steady. This could be what causes the bogging? If I'm giving it throttle but it's a "down" swing so it doesn't get fuel and just bogs hard?

I think all the adjustments has done has make it run richer(?) and masked whatever other problem is there. The TPS clearly wasn't doing well but it's adjusted to richer than spec and still struggling with power. 🤔 it's at the mechanic tomorrow for a tyre change anyway, can anyone think of anything I could get them to check while it's there? I'm not a fan of mechanics doing exploratory work, esp. on an older and abused bike, there's all sorts wrong that I know full well about that they'll get distracted by. But they are experts so if I can direct them to check some things I'm more than happy with that!

That's a good point, I did one this morning (leaving for the mechanic in 10 minutes). The flow was OK, it was about 300ml after 3 ignition sequences, taking into account how much I spilled on my hand trying to catch it without a length of hose 😅. There was no obvious contaminants or gunk but it was pretty cloudy, I'm not sure if that's normal for what I filled up with since I rarely see it in containers it doesn't look right to me though. It was left sat for a LONG time previously, just over a year I think, but there was very little fuel in there and I topped up full with fresh and have ran it for about 5000 miles since then so I assumed that would have burned through by now, maybe not? I think I'll ask them to drain the tank fully and swill it out a bit, just to be safe, not a big job when you're already at a mechanic.