I ride a 2007 zx6r i got a few months ago. i noticed that my rear brake pads were rubbing the other day so i lifted the bike up and took a look at it and they were indeed rubbing the brake disc as if they were slightly engaged. I proceeded to remove the caliper and took the pads out noticing they were worn and scratched up a bit so i removed them and pushed the piston in replacing them with new pads i keep for backup. After installing them i checked the tire and no rubbing or anything of the sort. I then pumped the brake a few times and its right back to how it was before. Spin the tire in N and it barley makes a full revolution before it stops. I pushed the piston back in so it won't rub the mile i ride to work every day until i can go to a shop next week. Any suggestions?