Check the cable free play 2 to 3 mm pull cable at the throttle grip and most important did I say most important!!!!!! Return cable free play is checked down at the throttle body beyween the cable tube and the throttle wheel. You dont want the stepper motor fighting the cable and all the springs inbetween the first throttle body and the next two ket alone the primary tps.
It could make the idle oscillate making balancine and a stable tps setting a bugger .