A repair manual that I have for the Agility says you should unscrew the pilot screw 3 plus or minus a half turn. I think when I adjusted mine I unscrewed mine 3 1/4.
If you already cleaned out the carb you can try checking your fuel and air filter. You can use some compressed air to blast them both out.
As far as the lights dimming, they will dim when the engine lulls at a stop. It's because the stator's spinning slower. So long as the scooter doesn't die then you should be good. If your worried check your idle settings. Put it on the center stand and adjust the cable up to the point that the back tire doesnt spin. That's worked for me.
Finally, do you have 7 amp fuses installed?
Good luck.
