I have a Fairplay golf cart that runs really slow (~8-10mph?). When you push the pedal down all the way it feels like it takes off but then almost feels like it tops out and slows down to a constant speed. Current motor controller is the Kinetek KCCA0004 0027. I have been reading a lot on the motor controller possibly needing to be upgraded to gain more speed. Is that true? If so, does anyone have a list of material to purchase and a manual/write up on how to install? Thanks in advance!