Motorcycle Repair: 1985 FXWG ... transmission oil change, transmission oil change, allen screw

Question
Never changed main transmission oil before and don't know where to drain, where to add, what to add, and how much to add. Please help.
Thanks in advance, ...jake

Answer
On the underdide of the trans, clost to the middle of the case, is the drain. The fill is a allen screw on the right side cover of the trans. Fill to the line on the dipstick with the bike sitting upright. Use oil that is made for harley trans
Good luck and happy riding
Mike