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I inherited a Polaris Sportsman 800 EFI with 50 hours on it but it was completely un-used for 15 years prior. 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 which caused all the lines to split due to over-pressure. 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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