Residual air...??? I`m guessing for that to exist that the suggestion might be that system may not have been properly bled... As I have typed previously, I have bled an ABS system using gravity only, which worked well enough.
I guess with ABS it may be possible that if part of the system has been drained, air could be trapped behind a closed valve and not released back into the system until the ABS is activated for the first time after the drain down...?
On the CX, it is impossible to purge by gravity. The ABS system is placed too low.
