idles but will not rev

[clueless]

well here we go!!! new parts arrived to stock shop. I took another CDI one out of this shipment and POOF, it is now the smoothest scooter i have ridden. I then took the four prior (the one on it and the three new ones from older shipment) put them on my scooter and they did the same in my scooter, idle with no rev. they went to the trash! 3 out of ten in one order were bad??? thanks for the help guys!