It's just a mechanical potentiometer that most likely is slightly out of adjustment. With the idle screw far enough out for the butterfly to close completely this is what your meter should see:
TPS readings from a showroom bike are:
Blue & Yellow wires = 4.42K OHMS (4.40-4.44) closed throttle &
1.38K OHMS (1.36-1.40) wide open throttle.
Black & Yellow wires = 0.81k OHMS (0.79-0.83) closed throttle &
3.96k OHMS (3.94-3.98) wide open throttle.
It would be easy enough to see if your TPS is out of kilter if you have your meter handy.
On the other hand lots of cats are running after-market carbs with no ill effects so if you don't want the timing advance electronically manipulated go ahead and unplug the bugger, it won't hurt anything.
