First I want to thank Notsoaverageguy for the starting inputs and Friedel who took the risk to fiddle with the TPS settings and described how he did it. Encouraged by Friedels result, I followed what he did (the TPS sensor factory value and new set for my bike are found below) and I have to say that I am also very happy with the results on my RS
. The throttle response has smoothed to what probably is best possible without a ECU reflash. The reason in my understanding is that the TPS sensor is now better calibrated with the actual throttle butterfly position. Of course the fuel cut-off is not eliminated and therfore the time delay for the injectors to restart remains. If the throttle (from closed throttle/ fuell cut-off) is fast-reopened, then due to the delay the bike still feels a little snatchy (if the reopening of the throttle is really fast, then the bike feels very snatchy), but if the throttle is gently/slowly reopened then the transition is now absolutely smooth.
Here is how I proceeded and how I set the TPS to its new setting. I followed the guidance of Friedel and made the same tool with a TT25 bit and a wrench for loosening the TPS fixation screw. I also used Kawasaki special cable"Throttle Sensor Setting Adapter: 57001-1538" to readout the value of my TPS and then set it to its new value. I recommend highly this relatively cheep adapter, it makes things easy. I also followed the recommendation of the workshop manual for the TPS setting value.
The whole procedure (loosing the TPS fixation screw, moving slightly the TPS sensor -definitively only about 1į if not less) and re-tightening the TPS fixation screw is definitively noting for the faint hearted or for any with the gross motor skills. The room for the tool is quite limited and the slightest movement of the TPS sensor affects its value. Re-tightening the TPS sensor also slightly changed its value, so that I needed a few try and error until I got the desired value set.
Now to my procedure and values (and sorry for the amount of numbers): The manual states the the TPS Output Voltage (between Pin 2-3) has to be in the range 1.02 - 1.04 Volt at nominal Input Voltage (Pin 1-2) of 5.0 Volt. If your nominal Input Voltage is not 5.0 Volt, then the Output Voltage range has to be corrected in direct relation. My Input Voltage (Pin 1-2) is 5.02 Volt and my (factory) Output Voltage (Pin 2-3) is 1.025 Volt. Now my Input Voltage is so close to 5.0 Volt that in my case I would almost not need to corrects the value in relation, but if somebody wants to follow what I did, he may have to correct his value if his Input Voltage differs, so I present the exact calculations:
The TPS Output range corrected for my slightly higher Input Voltage of 5.02 Volt is: 1.0241 - 1.0442 Volt (higher by factor of 5.02/5.0). The measured (factory setting) Output Voltage of 1.025 Volt for my TPS is in the admissible range, close to the lower admissible value. I want now to set it to the highest admissible value (probably what Friedel did). In my case this would be 1.0442 Volt, or a factor 1.0442/1.025 = 1.0187 higher than actual. If instead of Voltage measurement one uses the resistance reading of the TPS between (Pin 2-3) then in my case it amounts to:
Direct measure of the resistance of the TPS sensor (Pin 2-3) is 1.899 kOhm. New target setting = 1.899*1.0187 = 1.934 kOhm. I managed (with a little luck) to set my TPS to 1.93 kOhm, close enough for me :-).
It can be remarked that the value (resistance value Pin 2-3) I measured and the value I set the TPS differ both from the ones of Friedel. I strongly recommend not to simply set the TPS to 1.93 kOhm (my case) or to 2.05 kOhm (Friedel) but in relation to the actual factory setting value as described above.
... now I don't recommend to anybody to follow the procedure. Kawa doesn't want us to do that and you risk to break your bike ... Personally I am very satisfied with the result.