S&S air filter: petrol drips onto the engine block

Hello, the previous owner has installed a S&S air filter at my Sporty, only the air filter, without S&S carburetor. Looks good, everything was great, the original was not there either. Problem: The not burned fuel (it seems quite a lot to me) collects in the air filter. If I put the bike on the side stand after a ride, it runs out and syphts over the engine block (see photo in annex). Not only looks ugly, I have to clean and puff more often on the hot Au also spuff (I’m not sure). Harley could not help me, that it is, in contrast to the original, an open air filter housing. I have now drilled a small hole in the lid, screwed a foam strip with the help of a suitable curved artificial strip inside in the housing (see photo in the appendix). My consideration: The foam absorbs the fuel, which can evaporate (sometimes partially) when the bike is parked, the next time the same Effek again t until the foam has to be replaced. Not a nice solution and it is also unclear whether this influences the air supply, I could not test it on a long distance. Does anyone have an idea for a better solution, maybe the same problem before? I wanted to solder a metal strip on the lower edge inside, but on the metal you can’t solder. Thank you in advance for any idea. And: Yes, I know it’s neither a beautiful nor a permanent one. But that’s why I’m here.