I found in the case of my bike, a 1978 CB750F Super Sport that the local northern plains dealers (ND, SD, MN, NE, and IA) did do a upgrade or mod to the standard factory bike. They had a tendacy to add a Vetter windscreen, ape bars, and a King/Queen seat with back rest... I have been told by a lot of Honda lovers that was considered a great value adding modification.
I am the third owner of my bike and talked to the origianl owner and he conformed what others told me. His/my bike was bought like that directky from the dealer, new in Omaha Nebraska.
Hated the additions and they are now long gone... I am spending the bucks and time to have it brought back to a semi-factory layout with my custom touches.