1tontj said:
But after lots of use the handles are getting more and more soft. They used to only move a little bit and work great, now you have to pull them far and they work only ok.
If it were a leak somewhere in the system, I would think it would be fairly easy to spot... I have little experience with motorcycles (just got into it recently) but I have hydraulic discs on my mountain bike, and a fluid leak would always be a simple thing to find. Particularly on something that goes in a dusty environment :)
Check your reservoir level, that will be an indicator if you're losing fluid somewhere you can't see...
Heat buildup has an effect on fluid and braking effectiveness as well...
Also, I would think this is something I used to do all the time on my mountain bike that would translate over 100% to a dirtbike:
If you don't break in new pads correctly from the start (mating them to the rotors), you suffer from much reduced braking effectiveness after they have high spots that have glazed from excessive heat buildup...
With the pads you have chosen I would think this is less of a concern, but still might be a contributing source. If the brake pad effectiveness was "reduced" from when the pads were brand new, then this would give the illusion of the levers travelling farther down as you would be having to use more force (travel) then you previously had to before the brakes starting falling off in performance..
Just a stab in the dark from me...
Feanor