Depending on the fluid you were using, that could have been your issue. I used a standard DOT 4 and I had to bleed between sessions, racing DOT 4 I could get 1/2 the day but a master would have fixed the issue and got me under 1:20 for sure
Maybe. Speaking of which, I have Motul RBF660 in right now, how often am I supposed to flush it out and replace with new?