Using this nylon prefilter is easy. First, make sure your carb intake air filter is clean. Then, simply place the prefilter over the top of it. When it comes to maintenance, check the prefilter regularly. If it gets dirty, you can gently wash it with mild soap and water, then let it dry completely before putting it back on. Note that this prefilter is sold separately from the air filter, so make sure you have the right size air filter for a proper fit.