fading

Did my first track day today on a short karting track, so lot's of corners lot's of braking. After about 10 min I lost all pressure in the brake lever, let the brakes cool down then I could ride for 10 min again and so on and so on. Brake setup is the standard 2008 husaberg supermoto setup...

I guy's I have a 2004 fe450; had her since new(almost 2 yrs now). My last 5 or 6 rides my clutch starts fading, it's clearly from heat, but water/coolent levels are fine or same as before. I have bled the fluid now after every ride tring to sort it out, used magura blood, ATF and 5 weight fork...