#1 Do you own and can you use a (digital volt/ohm meter) DVOM? If so, hook it up and watch a "sweep" of the entire range of the TPS voltage. Do this slowly and watch for glitches. It wil probably be ok, since the majority of wear will be at normal (highway speed) throttle opening.
#2 Does this bike have ANY modifications? If it has a Powercommander or any device in the circuit between the wiring harness and ECM, unhook it and run it without it to see if the problem is still there. If it changes, the Powercommander needs to be "remapped". This should be done by a professional. They know what to look for in changing parameters on the remapping.
HTH!!!!!!!!