Your carb doesn't have an adjustable main jet. Are you talking about the float needle seat or perhaps the altitude adjustment jet?

Thanks for the reply Orangedotfever.
I removed bowl, float,needle,etc. all look ok.
There is a plastic tube protubing down into the center of the bowl with a brass jet threaded into it. I need to know if the brass jet should be screwed up to its stop or if there is a turn setting for it? I think its a simple venturie jet and should be screwed up to stop but am not sure? Im confused here because the fuel stains on the brass jet indicate the brass jet has not been seated to its stop originally? What do you think ?

The only part that looks like what you are talking about are on the 1983 and 1984 models and are called a "nozzle" not a jet. I would assume that this part just screws in and seats at a stop without adjustment and has the proper orifice size. Maybe someone else knows more.