Using your K&N custom round racing assembly is a breeze. First, make sure your carburetor is clean and free of any debris. Then, carefully install the assembly on your carburetor, ensuring it fits snugly. When it comes to maintenance, check the air filter regularly. If it looks dirty, you can wash it using a mild detergent and water. Let it dry completely before reinstalling. Avoid using harsh chemicals as they might damage the filter. Also, make sure to tighten all the bolts and connections during installation to prevent air leaks.