Reply To: Movement on rear brake caliper hanger – 2009 GT125R
If the square block inside the swingarm is greased a little bit, it helps.
It is “normal” for it to go up by 1mm max , it’s to allow some clearance.
As Simon says , it should be a tight slot or the caliper won’t move at all 😉 if the axle is moved again for chain tension adjustment.