Motorcycle Repair: Oil Change, drain plug, motor oil

Question
When I change my oil on my 2003 Road King, what about the primary drive and the transmission? If I drain the oil from underneath the bike, does that take care of the transmission and the primary also, or do I even need to worry about that?
Thanks so much for your help!

Answer
No, the trans and primary are seperate from the motor oil. the trans drains from the same pan as the motor oil. the drain plug for it is on the pan on the right side of the pan. the primary drains below the primary at the back of it
Good luck and happy riding
Mike