Where is the oil drain plug on a 2006 Harley Davidson Sportster?

If you look under the motor on the 2006 HD Sportster you will find a hose with a plug and hose clamp. Loosen the clamp, the gently pull on the plug (there is a place where you can grab it), then drain the oil out. Make sure that you take the oil tank cap off to allow the oil to flow easily. When you put the plug and cap back on and fill the oil tank, make sure that you remove any air in the hose with the plug. Once filled, take the plug and slightly allow just a little bit of oil to flow out, then re-tighten the hose clamp and you're done.