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fan works perfectly new thermostat radiator is hot air blowing against motor from fan is warm coolant appears to be cycling tested out radiator cap from a 2005 polaris sportsman 400, no difference in overheating, they are the same cap as far as i know trouble code 45 (barometric sensor circuit...

I just got my first ATV so I'm a newbie! I used to run Jeeps but with gas prices an ATV makes more sense. I bought a 2000 Polaris Sportsman 500. It ran fine when I took it for a spin around the guy’s driveway. When I got it home I greased it all up good and took it for a light duty drive...