you need a servo to program the thing just hook one up to the modual. the fist step of the programing sets up the choke for open and closing of the choke it wont mater if its hooked up or not just remember what direction the servo travled when you go through the steps so when the 2nd part of the programing asks you to open or close the choke you set it in the same direction as they are ussing the choke as a indicator to program the type of exhaust. All you that you need to know is what direction the servo travels when you move the servo. they do it this way because not everyone has there servo horn mounted on the same side of the servo as well as teaching the ignition what the end points are on the linkage. so technicly you wouldnt even need a sevo you would just need to remember what direction you move the throttle stick on your transmiter when it asks you to open and close the choke. I would just say down was closed and up was open and proceed with the programing. I hope this helps