My neighbor has an 05' Road King and just had to replace his rear tire. After he did he noticed that he kept having to pump up the pressure for the rear brakes every time he used them. He said whenever he gets them pumped up they hold and that they don't leak down as long as he holds his foot on the break. We cannot find any leaks anywhere and he has bleed them and replaced the fluid twice with no luck at solving the issue. The brake fluid starts getting this white milky look to it after he uses it for a while. I think it is getting air in it somehow and the tiny air bubbles are what is giving it that look. Anyone have any ideas what may be going on?