The clutch pedal on my 90 GSX is pretty soft and has about 2" of nothing (when you first begin to push in). It's not losing fluid and I bled the master cylinder and slave cylinder, and it's still soft. The car has a Spec Stage 3 clutch in it, but the pedal feels like it's a stock clutch (or worse) AND has the useless travel.

Any ideas on what's causing this, how to fix it, etc?