Just curious, have you tried a 50cc pump?
On them troublesome 750 dp's I always swap out the smaller 35cc pumps and go with the bigger 50cc pumps - usually 9 times out of 10 them hair pulling WOT hesitations will go away instantly.
You need super crisp off idle throttle response for them killer lights and quick short times, especially if your foot braking.
I'd start with the primary first then go to the back if it stills needs more.
Always worked for me, goodluck Cp