So this is what I started with. I ground it down so it would have a chance of fitting in the hole of the hydroboost. The blue mark is 1.1”, or the minimum it is supposed to travel to bottom out the tandem master cylinder. Right now I’m at about 3/4 - 7/8”. That’s the full travel of my pedal. The only way to get more travel is to mount the clevis fork lower on the pedal.

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