Prolific Poster Award
Join Date: Jan 2008
Location: Mckenzie, TN, USA
It's not just endemic to Ducatis guys.
Hondas, Suzukis and Kawasakis do it too.
I asked why back in the 90's at the big bike dealership.
We surmised that since the clutch master cylinder displaces so much more fluid, the dirty fluid was getting dragged back up into the master cylinder reservoir. Just from the rubber seal rubbing against the bore, the fluid turns black from aluminum residue.
'95 M900, '87 750 F1b, '95 GL1500, '06 620/800 MiniStrada...
Running on coffee and sarcasm...