master cylinder started leaking from the gasket under the cap.
A fxdc I test rode from a dealer a couple of years ago was doing the same, both with 3000 miles on clock.
Anyone had similar issues on later models.
I have found out that softails had an upgrade cap n gasket for 2010.

 

Had a buddy that was complaining about the same thing. One thing I noticed when looking it over for him was the cap was awfully tight. Loosened it up a little and it stopped. Over tightening the cap will cause the gasket to leak.

 

Stealer covered my paint peeling cover under warranry, 2+ on too tight cover.

 

Take the cover off wipe dry all sealing surfaces reinstall gasket and cover. Tighten cover to 6-8 in.lbs. That should stop it.

 

+3 on the too tight syndrome. I bought my 06 streetbob with 2100 on the clock, and that was the one thing wrong with it, the front brake master cyclinder was peeling paint. I replaced it with the chrome master cylinder and then cleaned, sanded and painted my flat black one as standby again. Bottom line, screws were too tight, which bows the gasket out slightly causing the fluid to sweat or seap out very minutely, and probably a combination of over filling it too. Since I have had the chrome one on I haven't had any moisture on the outside of it. Those screws do not need to be very tight at all. Just tight enough to seat the gasket where you don't see it indent or crush down, and then just a hair, and I mean hair more.
I got a buddy that just bought a 10wide glide, nobody has done squat to it except the dealer, and I noticed that right off the bat, his front brake master cylinder was sweating a little around the gasket area. I told him my story and said pull that cover off check the level and retighten those screws, and clean that brake fluid off there.
Matter of fact, when I changed out my brake lines, over hauled my calipers and master cylinders, that was the time if I was gonna do it to change over to dot 5, which would aleviate paint bubbling problems but, after much research, I shot it down, dot 4 is here to stay in my ride, especially in a humid climate like the coast.

 

Mine to both the front and rear master cylinder. I had it at the stealer once for the front one now its eating all the paint on there. Just noticed the rear yesterday. Apparently the MOCO has had a lot of issues with this

 

I think it has more to do with the DOT 4 brake fluid than anything else. It's quite corrosive. DOT 5 is not as corrosive. My front master cylinder is in horrible shape from the DOT4.

 

mines leaky with bubbling paint. another guy I know with an 06 softie is missin a lot of paint off his too.
I'll have to try the 6-8 in lbs trick

 

Thanks for input guys. I'm gonna take mine apart, clean her up, replace then, get a couple of sweat bands, cover rear caliper and stuff other one under seat. When front starts leaking again because it seams to me it will do, put sweat band over front until taken apart and cleaned. Reason for the bands is to be sure no DOT 4 gets on tank or another paint work.
HD need to sort this, simple 30 pounds/ 60 dollar ish item, ain't good enough after over 100 years.

 

Thanks for input guys. I'm gonna take mine apart, clean her up, replace then, get a couple of sweat bands, cover rear caliper and stuff other one under seat. When front starts leaking again because it seams to me it will do, put sweat band over front until taken apart and cleaned. Reason for the bands is to be sure no DOT 4 gets on tank or another paint work.
HD need to sort this, simple 30 pounds/ 60 dollar ish item, ain't good enough after over 100 years.