First the video is not a MK-3 , the MK-3 has a oxygen sensor, really not sure if the video being a UK bike has the oxygen sensor or not. If it had then it would be closed loop the same as the MK-3, since I have done some research into this with the TPS, I can tell you that the huge change adjusting the North American version MK-1 and MK-2 TPS , only changes the fuel economy on the MK-3, no other difference.
I went and did a search, http://www.kawasakiversys.com/forums...ht=boosterplug
and no real definitive posting here either.
IMHO a change as has been suggested in this thread http://www.kawasakiversys.com/forums...ates-bike.html
to the ECU would be a much better investment.What you get in the booster plug is a external temperature sensor and a scaled input to the ECU to indicate the air temperature is 20 'F cooler, so a sensor, a scaling resistor and some blocking diodes and possibly a chip set, with two plugs.Several ways of accomplishing this. One would be to install a sensor in parallel , scale it to reduce the input resistance value, the second would be to put it in series and scale it.
I just looked at the wiring diagram, identified as #41 , described service manual 3-53.From the manual:
Intake Air Temperature Sensor Resistance
Standard: 5.4 ∼ 6.6 kΩ @0°C (32°F)
0.290 ∼ 0.390 kΩ @80°C (176°F)
If the reading is out of the standard, replace the sensor
(see Intake Air Temperature Sensor Removal/Installation).
If the reading is within the standard, but the problem still
exists, replace the ECU (see ECU Removal/Installation).
As you can see, the warmer it is , the lower the resistance, that is, a increase in resistance = a lower temperature.
I just might experiment, total cost about $0.90