Renewing the old Air Filter foam inline with the suggested service interval requirements will help protect the engine internals as well as helping the fuel/air mixture to remain constant. When replacing the filter though, it is worth inspecting the other components that make up the air filter assembly for damage and degradation, renewing any suspect parts that may damage or impede the correct airflow.
More related parts you may wish to consider:
Make sure the only air to enter the carburettor is correct filtered. Add as many items to the same shopping cart as you wish, new Holder 1379104F00 washer 1379213A01 clamps 0940256208 0940260208 & bolt 0911906062 for example, and still only pay the same single fixed price shipping cost. Please be aware that this component may have other applications within the Suzuki model range.