1&3/8" bore: man I bet that would be a rock hard,virtually no travel pedal. For a retainer I used a piece of vac hose that looked identical to an original one that I had in my stash except for the groove along the length of the orig one. I'm good so far,Doctor diff do you see any problems with using that for a substitute. .

live every 24 hour block of time like it's your last day on earth