The controller has a tiny spring hooked onto the throttle that keeps it down. To remove the spring, remove the screws on the back of the controller. There is one behind the charging cable, just pull the slider back, then pull it off at a slight angle. It might take some force but be real careful! After that, flip the controller over and pull the front part off. Remove the screw holding the spring in place and pull the spring out. Screw the screw back in. Take the spring and hook the two ends together, forming a circle. Then take the circle on with the hooks facing down, so that the spring rubs against the throttle, forming a little bit of friction. Then take the charging cord and untie the knot, giving you about an inch extra of cord. Then put the front panel back, flip it over, put the screws back and pop the slider back on.