forever4,air filters on A's are all aftermarket,if the small hole in airhorn can't drain the gas fast enough if the carb decides to flood you might wind up with a big problem when the airmaze gets saturated with gas,why take a chance,air filter is not necessary anyhow,mostly just restricts the airflow to carb.I use to run that 4 blade fan years ago,weigh it compared to stock A fan and you will understand why the pump bearings start to wear prematurely.