Time to "refresh" brake fluid which I do every 4th or 5th track day.
I just bleed out and discard the fluid in the front calipers and top up with fresh fluid - uses less than 500ml, and firms up a squishy pedal very nicely.
Price update: I bought Motul RBF660 today at the bike shop in Nelspruit.
Same price as a few months ago (R220/500ml), but this time I wangled a 10% discount, so nett price of R198/500ml
That's about 35% of the price of Endless RF650, and it's (IMO) nearly as good.
Works for me