The pads still have about 5 - 7 mm, maybe some brake fluid got on them but I washed the disk with water and contact cleaner well.
My brother told me that it used to do the same when he used to compete with it, maybe the brake pads are burnt or bad quality or something?
Personaly I never changed the pads, front disk is new.
today ill try touching them with a sandpaper and see what happens as I cant find any in my country, will have to wait so I can order from uk because of christmas gifts...
Thanks james