In my past, I had always loved the idea to sit down in my motorcycle. Not on it. My scoot is a 1992 FLHTP. 1996 was the last year for the style frame mine has. They dropped it in the seating area, by an inch or two in 97. It was out of the question for me to alter my frame or to purchase a newer one so I could sit lower. 
So I altered my seat. 
On the base of my seat there were two plastic stand-offs, or raised knobs. For the seat to rest on the frame at these points. I used a soldering iron to remove them, a hack saw poses more of a threat of possible giving the cut area a chance to crack from vibrations. Cutting these, dropped my seat about 3/4's of an inch. The next thing I did. Was to remove the staples from the bottom of my seat and pulled the covering off. Revealing the solid, molded foam rubber cushion. The best way I found to cut this foam, is to use an electric carving knife. Yeah, the type you use to carve turkey. The cut is consistent and clean. First you should use a magic marker to mark where you plan to cut. I first did cuts across the width of the seat. Actually cutting the foam about an inch deep, noting and checking to make sure I don't cut all the ways through it. Each cut was spaced from the next by 1 and 1/2 inches. The spaces I cut between these sections. actually looked like long cheese wedges. I did this so that the foam now has individual rows of cushions. (So that I'll be sitting on more than one cushion, instead of one solid one.) (I did this for me, I have a skinny butt, no natural cushion). The next thing I did was to carve the sitting area, giving it a concave appearance. Like a bucket seat. When I put the covering back over the cushion. I attached the material with rivets and small washers that u can buy for the rivets. After a few rides, the leather or vinyl will stretch and conform to the reduction you did to the seat. If you end up removing more foam then I did. You can always add sunken buttons to pull the leather or vinyl against the foam. All the seats I've seen that have sunken buttons, have a material tied to the button, so that you can anchor it through the foam and even to the seating pan. I found that if you use a thin wire, like what you find that the news paper company bails their stacks of papers with. That will work fine. And by twisting the wire, (you'll want to use a small cotter pin, that you'll attach or wrap the wire on, for the ease of winding and to also keep the button from pulling out.) It makes more of a permanent hold for securing. It's much easier to adjust the button's depth too. 
 
I now sit in my bike, not like in the old days of my chopper years. But at least I don't feel like I'm just sitting on it.