Using your K&N Universal Air Filter is easy. Just find the right spot for it on your equipment according to the air intake design. Make sure the rubber flange fits snugly. If it's a bit tight or loose, you can stretch or adjust it slightly as it can stretch up to 1/16 of an inch (1.5mm). When it comes to maintenance, since the filter is washable and reusable, you can clean it regularly. Use a mild cleaning solution and rinse it gently. Let it dry completely before putting it back in place. One important thing to note is to always check the flange for any signs of wear or damage. If you notice any issues, it might be time to replace the filter to keep your equipment running smoothly.