I change my fluid 3 times since last season.
The guy who sold me his bike, never changed brake fluid.
Bike was already 6 years old, and fluid was almost black,
I don't know how that stuff even worked.
First time after change, brake fluid got dirty after month of usage.,
so I did it again, drove for 2k, changed it again.
So beginning of this season I did it again, and so far looks like brand new.
I think now my system is clean, and free of that old crap.
For now I will stick with DOT5 .
" Never drive faster, than your guardian angel can fly."