No I have not done any carb mods. What do you recommend besides a rejet? Also I will clean it up with the CVT and see what that does. The belt is a new gates belt. Thanks for the advice. Also I don't know what your views are on break in, but over the past 2 new scooters I've owned I have always done a hard break in. I know that people have alot of different opinions on that. Here is what influenced my views on it that plus I have had no problems with the scooters I have owned.
http://www.mototuneusa.com/break_in_secrets.htm