Using your K&N custom air filter is easy. First, make sure your carburetor is turned off and cool. Then, carefully remove the old air filter and install the new K&N custom air filter assembly in its place. Ensure it's properly seated. When it comes to maintenance, you can wash the high - flow air filter when it gets dirty. Use a mild detergent and warm water, then let it dry completely before reinstalling. As for precautions, always handle the filter gently to avoid damaging it. And remember, a clean air filter is key to optimal performance, so check it regularly.