I just spoke to Competition Werks and they told me that the Assimilator II break light does not work on the 919. Also the break light works but does not pulsate on the 599.

I installed the Assimilator on my 04 and the brake lights do pulse. I'm not sure if it's the Assimilator II though.

I at times consider making a change to disable the pulsating feature. Lance rode with me and reported that it is difficult to ascertain, at first if I was tapping the brakes as a caution or braking hard.