Cable stretch won't apply in this case...that's on mechanical brakes.They are hydraulic xt brakes they are the 2013 models with ice tech.
My use of the word 'purge' is somewhat nebulous. I used the purge as opposed to 'bleed'. What I mean by purge is not really a full-blown bleed job. On the XT's, the reservoir has gotten a bit too low and air has likely mixed with brake fluid in the master cylinder reservoir during a crash or on a rough section of trail. This air has found its way into the master cylinder piston and perhaps slightly into the brake line. Fortunately, the air is most likely trapped in the upper portion of the brake system.Hey guys I haven't posted in a while because I've been busy. Cleared 2 land I'm a noob to brakes and was wondering if you or someone else who reads this could explain how to purge a master cylinder. Thanks