A fuelfilter makes sure no dirt or debris gets into the carburettor. That’s not only extremely important for tuned engines, it also is advantageous if the tank of your daily driver or your vintage scooters is slightly dirty or rusty. Add the filter anywhere in the fuel line between tank and carburettor. The fuel filter fits a 6mm hose and it features a bolt on cover.

Conclusion: A small part with a huge influence.