Hi, I know this is a learning curve, keeping on top of bike maintenance, but it is an expensive one! Ok, i was cleaning the bike, and took off the rear wheel, then accidentally pulled the brake lever whilst the disc rotor was not between the brake pads! Arghh! So i have undone the torx screw on the brake lever resevoir and pushed the pistons back into place, then re-tightened the torx screw back up on the brake lever resevoir, have put the wheel back on the bike, with the rotor back in the right place. Now, however, there is no power in the brake. I have pumped the lever many times, but to no avail. I don't think i have lost any brake fluid from the resevoir. Can anyone help?