That's an interesting bit of information. So the Ducati Hypermotard is fitted with non-rebuildable front brake master cylinders? A motorcycle that had a $15,000 MSRP is fitted with throw-away front brake master cylinders? That's nearly shocking.Fluid is leaking past the seal and out the vent hole. There's no rebuild kit available AFAIK. Replace the master cylinder. Brake fluid is corrosive to painted surfaces so you don't want it blowing back onto your bodywork.
Especially considering the fact that "super moto" bikes see fairly harsh treatment.
Ya learn somethin' new every day .... unfortunately sometimes it's bad news. :frown2: