Also you could also flush the system with fresh fluid, probably won't change the engagement point, but it may.
You will be shocked how much crap is in the fluid
First, drain your fluid in the master cylinder using a large syringe
DO NOT OPERATE THE LEVER!!
wipe the interior of the reservior with a clean lint free cloth
if needed use some type of probe wrapped in cloth to clean the window
(however I don't think you will need to, more likely the fluid was dirty)
Refill the reservior with new Dot 4 or Dot 5.1 -----NOT DOT 5----- fluid
Remove the left fairing and get access to the slave cylinder "Bleeder"
place one end of a piece of clear tubing on the "Bleeder" and the other end on the emptied syringe
Crack open the "Bleeder" then draw out the fluid till the fluid is clear
(this may take a couple of shots at it, closing the bleeder each time)
be sure to top up the master as you go so not to draw air in the system
Large syringe (about 60 ml) costs about $2.50 Au at the local chemist
Use plenty of rags as covers in crucial areas, as brake fluid makes great paint stripper