I'm not sure we did. The one way to settle this is to have two people without valves go open and bleeder and see what happens.



If it did work without a valve, then look at this scenario. Back brakes set up very tight, front loose. You push on the pedal, rear makes contact, and no further pedal movement, no front brakes applied. (Which is why there is the internal connection)


But, this should be a learning topic, but until we have some actual testing, we won't know.


I have done this, seen others, which is why I am reasonably sure all dual systems came with a valve. And not just to light a light.

I will say no more.