In the manual, if there is no mistake, they say to connect the brake proportioning valve with the FRONT brakes, which will increase or decrease front bias and won't change anything for the rear.
This is quite odd, I and my mech have never seen the adjustment done to the front brakes, it's always the rear, cuz the weight transfer on braking makes the rear lighter, requiring less brakes.
Is there a reason for that?
Is it cuz there is way too much brake up front?
What if someone uses the OEM standard brakes, vs OEM Brembo brakes, vs Wilwood 12/12.2", vs Wilwood 13"? Do we still need to connect the valve to the front brakes?