ok, i talked to my dad this evening and i brought up the question about waving at other bikers on the road. He drives a Harley Davidson Road King.
he said most times he is the first to wave. There are times he doesnt wave if he is shifting gears or something, but other than that, he always waves to any bike. He told me that he could understand why some bikers wouldnt wave back.......i guess its some kind of macho thing?