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 ...

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.