Possible that the teflon got to the internals somehow and blocked the flow of hydro fluid. Or in the wreck the cylinder/plunger that is connected to the lever may have been damaged. Does the lever move freely when it's not on the bike? How clean are the pistons in the caliper? If they're dirty they could bind up in their bores- take the calipers off and remove the pistons, clean em up, check the piston seals for debris or extreme wear, gently clean seals/or replace, reinstall cylinders. There's only a few moving parts in the front brake system- the piston in the master,and the pistons in the calipers. Each of them has replaceable seals/ rubber parts that can wear out. Did your system work fine before the upgrade? Make absolutely sure there is no teflon tape obstructing the vale openings!!
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