Join Date: Apr 2008
Location: Atlanta, Georgia, USA
Hello and Welcome!
I know the GL1200s well, having owned a 1984 Interstate and still owning a 1987 Aspencade.
The seat you got was either modified by a previous owner or it was not really a Honda OEM seat.
The '84 through '86 seats were ALL the same shape, size, and dimensions. There were a couple of different colors depending on the color of your bike. One was a blue-gray color and another a burgandy-brown color.
The big change was in 1987, when the shape of the seat was completely redesigned and three density foam cushion material was added. The '87 GL1200 seat is the best by far and named by many as one of the best seats ever put on a Gold Wing, regardless of year. If you see one, you'll know, since it does not have the side-to-side hump in the middle like the '84 to '86 seats have. Not a big picture, but that's a stock Honda seat on my '87 Aspencade in my avatar.
And, YES, a 1987 seat WILL fit on an '84, '85. or '86 GL1200. The mounting holes are identical. That's exactly what I did to my '84 Interstate when the 87s came out. I bought an '87 seat and put it on my '84. Wow! What a difference. Best money I ever spent on that bike back then. Wife said the same thing as well, since the passenger portion of the '87 seat was made flatter and wider with less slope toward the front.
2006 Arctic White GL1800
1987 Black/Grey GL1200 Aspencade
1981 CB750 Custom (being restored)
1981 CB650 Custom Blue/Blue (Sold)
U.S. Navy SWO (1967-1976)