Thanks for the comments. Verslagen, thanks for the links.
It looks like nobody's ever done it.
I'm beginning to see the problems with the stock seat as I am riding more and longer distances on this bike. The other day my 11 year old son and I went riding. After about an hour and a half, he said something on the order of 'Daddy, I think we need to stop for a minute. I can't feel my butt anymore'. Sure enough, I hadn't noticed it either but mine was completely numb too.
The big touring bucket is the most comfortable seat I ever had on any bike. Lots of room and just enough cushion to make it comfortable for all day. Did manufacturers decide good seating was something for the aftermarket or something like that?
WD, I have definitely noticed that the frame is sort of oddball. The frame ends under the seat and the fender supports everything back from there.
What happened to frames that extend to the back of the seat and passenger footpegs on rigid mount, not the swingarm? And, what would I do about that big dip for the front seat? All the older seats are relatively flat bottomed.
When did bikes shrink? Back in the day, a 650 was a big bike. This one is sort of small. It actually feels smaller than my CB 350. But, with lots more power.
I sat on a CB1100 the other day, that thing is tiny.
End rant about things changing.
I'll be taking a close look to see what I can figure out. I certainly wouldn't mind the seat height being raised a few inches. It would probably have some undesireable effects on balance, though.