0
The top of my master cylinder and every brake fluid bottle always says to use brake fluid from a 'sealed container'.
I can understand that you don't want to leave the top off the bottle for a month then put it into your reservoir. But if you have the cap on tight, and a few weeks pass between doing the brakes on a couple of bikes,can the brake fluid actually absorb enough moisture to be a problem for the second bike? Is it really open and discard whatever's leftover?
Thnx.