Clive, I think is a common problem aftermarket brake suppliers should be aware of. My symptoms were the same with the R1 Concepts brake pads. Simply put, stopping power was gone, resulting in MANY scary situations were my VX did not want to stop. All those problems are gone now with stock pads. Kenny said he found out that it was the thickness of the aftermarket pads.
Bart
I found the new pads and rotors substantially decreased pedal travel. I’ve had no issues with ABS.
Although the ABS light did come on when I blew a fuse playing around with my speedo cluster. Replaced the fuse and the light went off.