You'll need a 1/2-inch wrench to remove the plug.
When removing the plug, be careful not to let any oil drip onto the exhaust pipe, as this could cause a fire.
Here are the steps on how to remove the oil drain plug on a 2007 Harley Davidson Ultra Classic:
1. Place an oil pan underneath the oil drain plug to catch the old oil.
2. Use a 1/2-inch wrench to loosen the oil drain plug.
3. Allow the old oil to drain completely from the oil tank.
4. Once all of the old oil has drained, reinstall the oil drain plug.
5. Tighten the oil drain plug snugly using the 1/2-inch wrench.
