Just to clarify something...I dont think the resistor actually fixes the level, though the adjustable resistor may.
As I understand it, and the reason I did it, was because there is a very fast drop from 3/4 to 1/4 tank.
Mine no longer does that...at empty, its at reserve or very close, so for me, no issue there, it was just something I didnt care for, and could remedy, so I did.
I had another Kawasaki that did the same thing, and it always bugged me.