Topped off the 105's MC today with DOT-5 and glad I did. The top of the cap for the MC (which ya can't see) is the same as the deuce cap with the breather tube hole in it, but no breather was there. It's fairly well protected up under there, but not THAT protected. Made up a temp breather tube till I can get a breather from a rear to put in there. One weekend I see a brake system flush and refill coming just for piece of mind.