Brake fluid is hygroscopic, meaning it attracts water even inside the hydraulic system. This is why all European car manufacturers recommend a brake fluid change interval, usually 1 year or 2 years.

The Actron brake bleeder is the best way to bleed motorcycle brakes that we have found so far. It’s a bit tricky to use, but once you figure out how to get the hose to fit the bleed nipple, it works ...