Welcome Kymco Owners!
I buy mine at jetsrus. You probably have Keihin PB16 carb on your scooter, Like 50 2T?.If you don't like jetsrus, do a search "jets" there are other suppliers. for example: http://www.kymcoforum.com/index.php?topic=9345.msg104040#msg104040.Get back if need more info. Cheers
Hello browncoat, not sure you need larger carb jet(s) until you modify air filter to allow more air, or install performance pipe. Good luck, cheers. :-)