I inherited a Polaris Sportsman 800 EFI with 50 hours on it a few years ago. It was completely un-used and sat for 15 years before I got it. The fuel system was a disaster, I had to completely removed all the high pressure rails and dismantle the tank and pump assembly. The pressure regulator was removed, for some reason and all the lines were split. I overhauled all of it, cleaned the injectors, retrofitted an external fuel pressure regulator and bolted it to the fame and have been putting the ATV to work since.
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