OK, stop laughing - it ain't pretty but my butt is happier!
And I'm no longer doing that "adult on a tricycle" knees flaring thing when I go down the road. I feel surprisingly more stable at speed with my knees out of the slipstream. (imagine an adult on a kid's tricycle doing 50mph - he ain't smiling) I think I'm actually sitting on or behind that pan bump which gets my knees away from the leg shield.
Built a curved back-stop for my rear near the back of the seat - no, never planned to take a passenger.
Kept adding foam and testing until the plastic seat-pan bump felt like something I could live with. That took 2 kinds of foam and 3 layers of it (3 layers ADDED to the stock seat foam - only the half-moon shaped bump was cut off the stock foam- w/electric turkey knife). Added a large curved chunk of the harder foam over the front to keep me from sliding forward at stops - when you add under butt foam you now have to raise that front bump, too. Scalloped a depression in the center area, and made sure to add more support on the
outer adges of the seat so I'd stop tipping side to side, and take some of the pressure off of the
center of my rear end - which was limiting my riding to 40 mins max. Used a can and a half of 3M spray glue for foam - bought the foam on-line - 5/16 " HD staples. 1.2mm wt Classic Saddle Brown vinyl (which is 2 or 3 times heavier than the balloon material Kymco used - and why they have no pleats) And, yes the vinyl IS very tight.
Instruction info from
http://diymotorcycleseat.com/tools.htmAlso hacksawed off that little thing in your left cheek. (about the size of a postage stamp)
Lessons learned:PAY someone else to do this! (took me right at 20 hrs and I may never play the violin again)
To do this without pleats in the heavier-than-stock vinyl you're going to have to use a sewing machine and cut the cover in at least 2 pieces.
If you're trying for a pretty seat - the seat-pan bump will still be there because you didn't use enough foam.
Not sure I'd try this on my stock seat - I used one from a wrecked 50cc LIKE from eBay. (seats are the same - though bucket is different)
Nobody under 6'3" can steal this scooter - he won't be able to touch ground.
Self portrait from my 1st ride this AM. As you can see, I'm a big guy - in all directions!
(also, how many noticed the conversion I did on moving the exhaust to the left side of the scoot!)