KX925,
It sounds like you need to bleed the Master Cylinder first. Remove the brake line at the M/C (keep the line up to keep most of the fluid in) & with Many rags around remove the M/C cap, next cover the hole where the banjo bolt goes with your finger & pump the lever a couple of times & hold in, remove your finger, continue to pull on the lever, hold lever & cover again with finger. After 5-6 times you will start to have "Feel" at the lever, re attach brake line & bleed ((I like using the Mity Vac).
Hope this helps & keep us posted!
DoldGuy