the FXR is notoriously bad for its front tyre wear...i hope they fix that soon, as i would think an AWD would be easy on tyres. But you can try R3's at front, the lose in grip of the tyre, could be made up easy by the extra grip over a hot tyre, plus perhaps 1 less pitstop.
Like bob said, move the torque bias to the back a lil, to give the rear a work out and take some load off the front.
Turn down the brake power as well, so u can minimise or even race free of lockups, which causes alot of problems.