ATV Performance Modifications motor work? January 6, 2016 I own a sportsman 450 ho and understand it’s the 570 engine tweaked to a 450 to have a machine in the 450 class. It there any way to get motor to a 570? Bike is strong, very happy, just wondering? Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related