I have a disposable fuel filter (Fram I think) mounted in the fuel line just before the front card. It has a clear plastic body, so it is easy to see if you are getting fuel to the carbs. These filters are not always full of gas, so don't be alarmed if you see an air space in the filter. Also done over do the filtration, it can cause fuel starvation. You also have the small screens at the fuel bowl covers on each carb.