I had stock everything at 5000 miles. No brake service, no problems, firm lever. Just an annoying dragging sound from the right rotor. I noticed the right rotor running 50deg. hotter than the left under normal riding conditions. Tried to warranty a fix. HA! not gon'a happen. They couldn't find anything wrong except a sticking caliper. not the problem. I found the rotor had about . 075" -.100" of run out radially. Over time the heat difference went away the noise didn't.
At 5500 miles, I tried different pad compounds & manufactures, still dragging, still annoying.
After rebuilding the calipers, pad swapping, installing braided lines, still dragging but I had a spongy lever. After bleading, Bled it a dozen times, still spongy. I knew it had to do with a miss match in wear & pad flex due to all the swapping and nothing fully "bedding" in.
It doesn't take much to make a lever move a lot. If you don't have perfectly flat rotors & pads or exactly worn & matched pads & rotors, The lever "Feel" is not going to be most desirable.
So I went all new with Galfer Wave Rotors & Galfer HH pads. Front & Rear. Without bleeding the brakes, just swapping rotors & pads, The brake lever moves a 1/4" (at the end)and is solid, so solid I had to readjust the lever closer to the grip. After some hard riding, still firm.
And NO DRAGGING! or noise of any kind so far.
They stop GREAT!
I LOVE 'EM!
I hope this might give you some direction as to what might be the problem.