Brake Question???

[nucseal]

So received my trike back from dealership, post recall. Still do not like spongy back brake.

Question: Has any one every used a Disc Brake Residual Valve, 2 PSI, in line to stiffen up the rear disc brake pedal for better response?

http://www.speedwaymotors.com/Speedway-Disc-Brake-Residual-Valve-2-PSI-Purple,5312.html

Thanks
NUc

 

[knob]

Curious, what type of brake lines does the trike have on the back?

 

[nucseal]

Curious, what type of brake lines does the trike have on the back?

Rubber 3/8"