You know to what RV is referring.....to?
CDave's justkdx website is linked in the 'every kdx rider should read...' post stuck to the top of this forum.
If your bike has not been tuned properly regarding jetting, you are missing out on the probably the single biggest 'modification' (largest bang for the buck) you can get. It's not rocket science. Do yourself a favor....do some research on this site, tune your scooter and you will be a much happier rider!