It is also very important to put a stop on your gas pedal if you are using one, because you have no control on how hard you stomp on the pedal on a rough track and the weight of your foot pounding on the pedal will break off the throttle shaft. I make mine adjustable and adjust it so that the throttle is wide open. It also helps if you can have a bend in your link between the govenor lever and the carb to give it a little flex, and hook the springs to the govenor lever and the pedal, because a spring on the throttle shaft causes wear. A very light one on the carb for saftey is ok.