I am having an issue with my 2010 Sportsman 500 HO. It starts and idles fine. it runs perfect until the engine heats up. Then, it cuts out, loses power at full throttle. If I back off the throttle it will run ok until I go to full throttle again. I have replaced the fuel filter, air filter, spark plug and rubber boot that goes from the air box to the carburetor. I have ran some sea form through it. No change with any of these. Anyone else experiencing this or have an idea of what could be causing this? There is no white or black smoke when this happens. After it cools off, it will run fine then start acting up again.

Thanks in advance!
Will