Dear friends
I noticed that my vstrom 2008 brakes were not performing as good as the valkyrie I/S (a motorcycle that weights more than twice and it is 16 years old).
I decided to change the brake oil (even though it looked fine through the reservoir crystal and was on the top level). Check this out:

Makes me wonder if that was the original oil when the bike was made in Japan way back in 2008?
And now the new oil:

Lesson learned: don't trust only on the reservoir crystal window. :-)
Best regards
Savago
ps: I tried to use a mityvac but the drained oil reservoir was leaking on it (came broken out of box) and ended using the goodie and oldie push brake lever/bleed method instead.