300ex back brakes will not bleed

[bnmm]

i really need help im 14 and wasted a entire night in my friends garage with a brake bleeder and everything, will not build pressure

[honda300EXtreme]

if its not pumping fluid through at all, i would rebuild the master cylinder

[John451]

Unscrew the bleeder valve. Lol jk. You took the lid off the mc right? And you know the whole bleeding beat right? Like when to push the brake unscrew blahh blahh?