Polaris Sportsman 570 Ngk mr7f? April 29, 2015 just bought a new 2015 570, the plug is the NGK MR7F. I’ve seen where others can’t find this plug, I also did a search and can’t find a thing on this plug, what is everyone else using for a back up plug or switching over to. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related