I just bought a 2004 Sportsman 400 from a friend of mine. To me, it sounds like it is running a little bit rough, sputtering or skipping almost. Here’s a link to a video of how things sound at idle and revving the engine a bit.

He stated that he took the carb off and cleaned it and put it back on and everything was nice and clean when he put it back together.

Any thoughts? Anything I should look for/change? Any help would be much appreciated!