I'm not aware of any built-in mechanism. I imagine somebody could shim between the slave cylinder and the bell housing to go one way. No idea how much change you could effect before the mounting studs became too short. To go the other way would require extending the actuator shaft somehow.
Isn't it automatic on the top of the pedal, a ratchet that takes up the free play to a point? Or are you concerned there's too much free play? Might be worth checking on REALOEM for a blow up of the pedal etc
