The goals for this project were:
*Make a seat for my Honda 100 out of material that I had lying around
*Have this seat be comfortable enough for rock and roll
*Have the seat look "professional" enough to be proud of
*Be easily removable
*And, most important, have the default position for my butt be almost a foot behind where the stock seat puts you.
I succeeded in these goals. At this point, this is an interim seat while I finish customizing the bike. I suspect that I will want to add more padding at some point (simply a matter of cutting the tape, laying a couple more layers of pad, and retaping). When I put a more classic tank on the bike, things will look less... jury-rigged. As it is, I kind of fancy it a "junior streetfighter" look without the side covers. I also enjoy not burning my leg, so the covers get put back.
If you like it, don't forget to cast your vote in the Craft Skills contest!
Step 1: Remove Your Old Seat
Don't do this during a short break in a rainstorm. You might think the rain is over, but it will start up again at the most inopportune time and you'll have to ride your bike back to the shed, in the soaking rain, with no seat. Not only is this unpopular with your tailbone, but I can assure you that you will slide off the slick framerails at least once. Fun.
Okay, got your bike out of the shed and into your workspace? Go get your socket set and an extension. A perisope attachment for your neck will also come in handy.
All the fasteners you will be cussing at measure 10mm for a Honda 100.
See those bolts? Yes, those, ungodly far from any human access? Remove them. These hold your back fender on. Removal of the fender isn't required, but it helps later, trust me.