OK, so now that I have one of the old 12mm master cylinders for the front brake I was doing fine. Right up until the bellows inside the cap split and now it spills fluid.
Anyone know if I can get a replacement bellows or cap and bellows. Yep, it is obsolete. Yep, most places that list it show it as not in stock.
Is there a substitute? Could I make one out of some neoprene stock or similar?