My method. YMMV.
I used a syringe to suck as much old fluid out of the reservoir as I could without uncovering the ports. It took almost 1/2 liter to refill it. I then bled about 1/4 liter from the first bleed screw in back to purge the long line, then did about 10 pedal pumps on each bleed screw after that with the pressure bleeder attached. Total volume about 1.5 L. On subsequent bleeds using the same fluid usually use 1 L as I don’t drain the reservoir. I push a liter through the system before each track event. Perhaps overkill, but after 30 years on track, I’m not changing up my game now.
I also use a syringe with a tiny hose (helps to have a vascular surgeon friend..) to remove the residual fluid from the bleeder screws so it doesn’t weep out when it gets hot.
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