ER-6f C9F,D9F,CAF,DAF,CBF,DBF,ECF,FCF (EX650) 09-12 ER-6n C9F,CAF,CBF,DBF,ECF (ER650) 09-12 EX650 CBF,ECF Ninja 650R 11-12 Motorcycle air filter is very important. The air filter filters the air supplied to the engine, removes dust, sand and other contaminants from the air and ensures that the air is clean. Suggestions: in the state of less dust, clean every 2000km or so, and replace every 12000km approximately. In the state of heavy dust skroacute; cleaning/filter element cycle. The new viscous and oily filter element should not be cleaned and cleaned, but can only be replaced directly. Please change it in strict accordance with the motorcycle manual. When the filter is manufactured, the plastic is bonded to the paper. It is normal for plastic to stick to the paper. It does not affect filtration and air permeability. Please rest assured to use it. The price of the goods does not include import tax, value added tax, consumption tax and other duties