Is there a special way to bleed the rear brakes on a 04 wr450? I have spend an hour on it and can not get any presure in the pedal. I have put in a new rebuild kit, and still nothing. I even filled the caliper with fluid and reassembled to make sure fluid was getting to the piston. I get fluid out of the bleeder, I dont know how much presure is there or how much it should be. Please help, I am going out of my mind.