For all the shorties out there, I though I'd put down to pen how I lowered my seat. I'm 5' with short legs. I used to have a Yamaha Vino 125 with a seat lowered about 1" so when I got the GTS, I was very daunted by the 31.1" seat height. I'd say I got about 3" off, mostly because I'm sitting a little more forward on the seat, where it's lower and narrower, and it's actually lowered. I also have a pair of low platform shoes (2" at the heel). I can now flat foot with one foot, and comfortable toe with both.
I used instructions from this person's guide, though it was lacking some details
So here are my thoughts and additions...
- Cutting the plastic was hard (everything is hard without the right tools). I used the soldering iron to cut the plastic of the seat
- I went close to the edge of the dip to get is as low as possible, that made it hard to merge to the remaining seat. I'd recommend a heat gun or blow torch to melt/bend the removed portions edges down so it will connect
- Be careful not to push or pull the plastic too hard, it can un-square the plastic, making closing the pet-carrier hard or require a little pushing.
- I only replaced the front half of the upholstery foam, leaving the passenger section intact. I used 1" very firm rubber foam. I used a long needle and embroidery floss to sew the new foam onto the edge of the old stuff so they didn't buckle as I pulled on the fabric
- The dip you make will be pretty damn deep, I added a circle of extra foam into the dip so i didn't sink all the way down. Made it more comfortable
- When you reattach them, I used a combo of the blow torch and butter knife, and soldering iron to merge the plastics. You may need some extra to fill in gaps. I used cut up plastic from the dollar store, but you could also use the seat cover hard plastic that comes out when you remove it
- I created a 'bulge' to keep me from slipping forward out of the old seat foam, i placed it at the front tip, then covered it with the new foam to smooth it out
- I used a knife to cut some of the edges of the foam down, to take bulk out, and keep my legs from going too wide on the seat
- The old fabric will stretch enough to get smooth
- Vinyl stretches best when heated. Either leave it in the sun, or use a heat gun or hair dryer to soften it up. Pull it little by little. Most of the extra fabric will be at the front tip.
- Use a heavy duty staple gun to reattach the fabric. Work from the back to the front and try to take turns left and right so you don't un-center your fabric
- Put a LOT of pressure so the staples sink in
I hope this helps someone else in the process. Good luck.