rear brake pressure loss

[kwickez]

after about a month or so my rear brake loses all pressure,then i have to bleed them and the cycle continues.any ideas of what is causing this??

[brokedad]

i had the same problem on my yfz after rebuilding the brake cylinder and it still does it i changed out my steel brake line and now all good.(note)there were no signs of leaks at the ends either.it was sucking air thru the fittings clamped to the line.
no brakes = no fun especially at glen helen.i had it made instead of ordering one and waiting it was 50.00 (plus 2 roll swinger)