Assuming the hoses are still standard, clamp the hose from the master cylinder. If it's still spongy you have air in the cylinder or time for a rebuild.
It can be a bitch getting all the air out. The method I used on the R6 yesterday. Calipers hanging by the pipes. I have a milk bottle with a pipe running into it connected to the open bleed nipple, one side at a time. Topping up the reservoir and allowing the fluid to run through itself. Tapping and moving the calipers around. Once you start to get clear fluid I did up the nipple and operate to level a few time to push some of the pistons out a bit. Clamp the pipe, open the nipple again and push all the pistons home with your hands. Did this a couple of time per side and got a cracking level.
Another is the big syringe connected the open nipple forcing the air and fluid upwards. Cover everything around the res as you will spill some. This way also works well.
Have fun.