General RZR Discussion Most reliable rzr engine to date??? September 15, 2015 Just out of curiosity which rzr engine do you feel has been the most reliable? 570,800,900 75hp, 900 88hp, or 1000?? Voltage regulators and other electrical gremlins don’t count. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related