Hello can someone please explain to me how the Raptor 660r carb works? i'm not familiar with the setup. I can see that one is a secondary, and one is the main. Also if the carb has been jetted do the air mixture screws need to be readjusted? If so does the secondary and main need to be readjusted and set at the same level? I am not sure what size jets have been put into the machine. I just know that is has been jetted.