Hello everyone. I have an intermittent issue that I haven't found anyone describing. I bought a 2005 Polaris ATP 500 a few months back. a handful of times so far I have shifted into reverse and the engine revs up and just as the machine is about to start moving, the motor throttles down. It doesn't stall or die. You can hold the throttle wide open and the engine just cycles up and down. I haven't noticed anything odd with the speedometer (since some people say it bounces up and down). The last time it happened, I pressed the override button and it reversed like it should. So does anyone have an idea what could be happening? Thanks for your help!