Hello my 2013 ktm 300xc front brake is losing pressure. When I pull in the lever, you have to pump it a couple times to build pressure. I can hold it in and It won't lose pressure, but when I let it off and ride a little I have to repeat the process. All I've done is bleed the brake and top off to get rid of a sponge feel. That diddnt even solve the spongeyness lol. The master shouldn't need a rebuild, it was working just fine before. Thanks.