ATV Repair and Maintenance 1992 Trail boss 350 – no spark October 29, 2015 I have an old 350 L Polaris Trail boss. It was running great, then started to backfire and eventually died. It does not appear to be getting any spark to the plug any longer. has anyone else gotten through this? If so, what did you do to fix it? Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related