I need to know if the air filter is supposed to have a inner filter in it? I went to my local small engine store to pick up a replacement filter and the salesperson ask me about the condition of my inner filter. I didn't know what he was taking about. I bought my super z last July and there was not a inner filter in the main air filter. I need to hear from you guys that run a super z. Do I need the inner filter??? Please let me know.