Proper jetting = MORE FUN!

So since I can remember I have been struggling with a slight flat spot in my acceleration, just out of idle. I have on numerous occasions tried to adjust my mixture, but never with much significant success. I stupidly had never really examined my jet sizes.  I was under the assumption that my jets were all the stock sizes.. and therefore just needed to be dialed in... WELL.... I was totally wrong. Whoever set up my scooter.. forever ago, put all different jet sizes, none of which were even close to stock. Since I have no mods on exhaust or carb, my understanding is that I should be optimal with the stock sizes.