Genuine Suzuki Sintered Pads are a start.
1. Change the fluid
2. Strip the calipers and clean the caliper pistons, remove the seals and ensure any gunk behind the seals is removed so the seals don't nip the pistons, assemble with red rubber grease
3. Braided lines
If that lot doesn't work, fit a radial front end off a GSXR or later Hayabusa :laugh