Do you ride 2 up? May sound odd but I ride 2 up with the MRS for 99% of my riding and naturally I sit to the left a little on the seat instead of the exact center so that the Mrs can see out front. I have found that when I remove my hands it veers to the left slightly but I know to lean a little right and that corrects it, not that Im out there riding with no hands all day ha! Could be something mechanical or could be something like that.
It's not that cheers
are the swing arm bushings good ? also check rear axle alignment (adjustment cams) if all good .... front tire
those are a few things i would check first
The swing bushings are good 👍. I do work myself I made a measurement rod that takes the measurement from the centre of the swing arm shaft to the centre of the wheel axle shaft, so that alignment is good .
I've checked the front bearings for any movement back and forth for any bearing play all's good.
I've done the FALL Away check and the wheel returns to centre but that's without removing the wing and not measuring the fall I think is 1/2" either way.
There is one other thing I've noticed the wheel is dragging on the brake pads a little enough that the wheel doesn't spin freely ( stops straight away) but not hard to turn,....perhaps the drag is the root of it. Only way to know I'm going to back off the pads then test ride if it rides straight then caliper overhaul.