Harley Brake Issues
I have heard some reports dealing with a small number of Harleys that have manufacturing issues involving the brakes. This is a potentially serious problem that can cause lockup and a crash.
If you smell excessive heat or see glowing discs (or are told your discs glow), the problem needs to be taken care of by replacing the offending part.
Again, this does not seem to be a common problem, and I do not want to be an alarmist. Generally, Harley makes a quality product, and this is a rare exception.
Having heard about it from an expert, I just wanted to pass it on.

By YouMotorcycle.com - Motorcycle reviews, roads, rides, and info September 6, 2011 - 5:45 am
I’ve found the brakes on the Sportster to simply be soft. I’m glad the one I purchased came with steel brake lines as the rubbers on the 2011 SuperLow I took out for a demo ride just didn’t seem to pack a terrible punch.
It should be noted that in the past the Sporty came with a 4 piston brake caliper and now are back to only 2 piston caliper. We can only wonder why….