Really not much going on inside that carb. I would make sure the spray bar is clean and leave the rest alone. There is a little green gasket under the gas inlet fitting that should be checked. They like to break down/decompose and start sucking air at that point. You can make a new one out of about anything that's gasoline proof. I used a gasket cut from a milk jug for my last one.

I don't think anything inside would need to be replaced if you did want to take it apart.