If you have a polaris engine 500 especially, and you have cleaned the carb or even replaced it with another one. And still it has a loss of power, but it idles fine.

Your camshaft is shaved off by soft metal polaris put in these engines.

This is 90% OF CHANCES this is your problem

proceed to drop a like and share, change the camshaft and valve adjusting will help

not too hard and will bring your engine back to life again.

Please like, Thanks.