Originally Posted by
peteg59
I have my FLH brakes tied both front & rear off the stock 1990 front m/c & they work well, however I'm only running 1 rear caliper.
It does make a difference in adding another caliper/draw, on the stock factory hydraulic system but I don't know how much in your potential case.
There are scientific formulas that can determine the requirements, on paper, for what you are looking for. Those exact formulas & answers are way above my current pay grade!
My personal, for what it's worth?, advice is: Try tying both together using a T, and other misc. hardware, then take it for a "safe" test ride, & go from there....