The TPS rational position can be adjusted by loosening the two bolts the hold it to the back of the throttle body assembly.
It should be positioned so that with the throttle closed and the bike turned on (but not running) you should get a reading of 0.375V between pins 1 and 4 of the TPS connector. Snap the throttle once or twice to make sure the throttle is fully closed.
FYI: It needs to be plugged in for this test. Just slip some thin wires into the connector when you connect it to monitor the voltage.
