2002 Polaris rmk 800 high end problems

I've got a 2002 polaris rmk 800. It has good power until about 3/4 throttle. After it bogs. The only way to ride it is baby the throttle. I've looked for any place it could be sucking air, I've cleaned the carbs, and cleaned exhaust valves not sure what to try. Anyone have any idea what to try.

Thanks for any help

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2002 Polaris rmk 800 high end problems