I have been researching some threads but not coming up with anything conclusive...you can mix DOT3 and DOT4 brake fluid correct? I sure as hell hope so anyway
I changed the brakes on my crossbones today and toped off the front brake with DOT3 before thinking about it.
DOT 3 ,4 and 5.1 can all interchange. HOWEVER DOT 5 is SILICONE based CANNOT BE MIXED in any way with other's .IF you replace ALL brake parts calipers,master cylinder's,lines at same time you can switch to DOT 5 .It won't draw moisture,higher boil point and won't harm paint .$26 a qt it is pricey. RIDE SAFE