Hello! I am trying to rebuild my 2007 gs500f carburetor, I noticed that the previous owner broke this part and attempted to fix it with JB weld. Looking it up the piece I need is not listed separate to the diaphragm cover assembly, and the assy is ~$120. I was wondering what exactly this part does and how important it is, and if i could replace it by simply buying and older model gs500 carb cover which does not have that piece and is just a simple cap.

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If youre not running emmisions, block it off and forget it

so not necessary? i can just rebuild the carbs w/o issue? thanks