Where is the oil drain plug location on a 1987 Harley-Davidson FLHT classic?

right hand sidecover, pull saddlebag, remove Allen bolt at bottom of sidecover and dipstick at top, pull sidecover. at bottom of oil tank you will see a sending unit with a single wire to it for the oil temp gauge. that is where the oil is drained. on the flht standard there is a regular oil drain plug in its place. when you replace the sender, do not apply excessive torque or you will break it. also use a folded piece of cardboard to direct oil away from frame or it will get all over the battery tray, exhaust and under trans.