I have only had my new RT-S a few days but one thing I am having a real problem with is the very light throttle. IE it takes very little pressure to move. A very light throttle return spring to overcome. Much lighter than the test drive RT I drive or my wife's Harley. Its so light that we are having trouble not jerking it with hitting minor bumps or turning a slow speed. Does anyone know if the spring tension is adjustable or how hard it would be to replace with a stiffer spring?