MY DAUGHTER HAS A 2000 SPORTSMAN 90. AT TIMES THE QUAD WILL NOT ACCELERATE. IT HAS THE ETC SWITCH ON THE THROTTLE. I HAVE A REPAIR MANUAL, BUT IT DOES NOT HAVE MUCH INFO ON SPEED LIMITER OR CDI. IT ACTS LIKE THE ETC SWITCH IS NOT WORKING CORRECTLY. I TESTED THE SWITCH & IT IS CHANGING SIGNAL. IT LOOKS LIKE THE ONLY OTHER COMPONENTS IN THIS SYSTEM ARE THE SPEED LIMITER & CDI BOX. DID NOT CALL DEALER YET (DONT THINK THEY WILL BE MUCH HELP OVER THE PHONE). ANY SUGGESTIONS OR INPUT WOULD BE WELL APRECIATED.