Since I bought my KR2 (slightly used) I have had brakes dragging. Visually everything looks fine no leaks. Yesterday I pushed in the pistons, bled the brakes and it’s still not springing all the way back. Any ideas what I should try next?
I would dismantle and clean the caliper. With the pistons removed you’ll see there’s two seals, your main piston seal which is a thick square o-ring and a thinner conventional o-ring. Apparently the second o-ring I mentioned can cause brakes to drag. Discard that o-ring and reassemble if everything looks ok.