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 between the cable tube and the throttle wheel. You don't want the stepper motor fighting the cable and all the springs in between the first throttle body and the next two let alone the primary tps.
It could make the idle oscillate making balancing and a stable tps setting a bugger .
Not sure if you checked this or not but I took the liberty to correct y spelling errors