How do you change the transmission fluid on a 2003 harley Davidson fat boy?

To change the Transmission Fluid on a 2003 Harley-Davidson Fat Boy, first ensure the bike is on a level surface and secure it with a stand. Remove the transmission drain plug and allow the old fluid to completely drain into a suitable container. Once drained, replace the drain plug and refill the transmission with the recommended fluid through the fill plug, using a funnel for ease. Finally, check the fluid level to ensure it's within the proper range before replacing the fill plug.