How to change a coolant temperature sensor?

[pantone]

My bike cant not start and the coolant temperature indicator only shows "Hi". I had removed the tank to access the sensor and find it was open(infinite Ohms). I guess I need to replace it but I had the following questions:

1. I don't want to remove the filter box and throttle body to have a better access because it seems complex. Without removing these, is it possible to replace it. I had imagined a long socket(I guess 18mm) with a long T bar may be required.
2. What kind of sealing should be put on the thread of the sensor before I install it? Is the white sealing tape used normally in house plumbing OK for this application?
3. Is there any Non-OEM sensor which can also be used here.

Thanks in advance.

 

[TownsendsFJR1300]

You should be good with a couple of wraps of thread tape (as you noted above).

Re removal of the switch, IDK, however you can get to it....

Good luck.