A word of caution when removing the allen sump plug, make sure it is fully seated and torqued when put back in. Because of the amount of vibration from the engine can cause it to come out if not properly fitted, this can lead to catastrophic engine failure. That is why Morgan and S&S dealers do not remove the plug when changing the oil. As said previously the amount of oil held in the sump is minimal. When the engine is running the oil passes through which is when you lose it if the plug should fall out.
