A key element needed for proper engine function is the constant supply of air. And the air cleaner and filter help ensure that the air passing into the cylinders are free of foreign elements and other bad things that might get sucked into the engine. Over time, though, the filter becomes dirty and may even get clogged, making its usefulness diminish. In fact, a clogged air filter can contribute to worse fuel mileage, uneven power delivery, and the overall poor operation of a motor.
The owner’s manual for your 2019 Harley-Davidson Street Glide Special indicates that inspection of the air filter should be done every 5,000 miles. The task is quite easy and only requires a total of two separate tools. You will need a 5/16-inch hex key to remove the outer cleaner cover, and a Torx T27 bit to remove the three bolts holding the air filter element to the air cleaner back housing. The steps are simple: Just remove the 5/16 hex bolt and set aside the cover. Next, remove the three Torx bolts on the back of the filter element and pull it away from the backing housing. On the back of the filter element is a breather hose that will slide out with a light tug.
Whether you decide to replace the stock item with a factory air cleaner or upgrade to a reusable air filter element, reinstallation of the parts will remain the same (as long as you keep the existing air cleaner housing). When reinstalling the pieces, don’t forget to reinsert the breather tube into the back of the air filter element.