My 2010 agility 125 (1200m) was not running well. The acceration was not smooth. It would bog slightly between 15-20mph. After doing most of the checking of common things, mixture screw, spark plug,dr sliders 13gr,carb. cleaning, etc. I turned my focus on the auto choke. Found a video on this, showing how to isolate this demond. Removed the choke assbly. made a gasket to cover the 3 o-rings then put the unit back in place. Now for the test: Temp in Fl 66 degrees, It started, but need some goosing, then it ran at idle as it should. Took it out for a test ride and to my surprise, the accelleration was awsome and the stumble that I had tried to fix was gone. the throtte was smooth at all stages of acceleration and steady.