Benelli carburettor top with lifter shaft , cable etc , I am fairly sure this is a 500 quattro carb top and I think it is from number 3 carb counting left to right as you are sat on bike looking down but please be sure from photos as I am not 100 per cent 

I do not know much about Benelli 500 quattros but this part seems in excellent condition and working smoothly with no play on shaft and only some end float  

Please be sure from the photo and information given that this is the part you require

Any questions welcome

SL U4