1995 Polaris Magnum 425 bogging down when throttle is applied

Hello I am back to ask some inquiring minds about a recent problem I have been having. The quad will start up and idle just fine but as soon as I go to give it throttle it seems like it skips a beat and bogs down sounds like its sucking air.

I have replaced the spark plug as well as a full carb clean. Before doing this it kept flooding and wouldn’t run. Is this a possible head gasket or another blown gasket, I have noticed it leaks a lot of exhaust out around the pipe and flange when revving. Or could need a carb adjusment? A few times it seems to pick up and run but not all the time.

If your wondering about the clamps on the exhaust its a little mod I had to do to get rid of that pos donut seal(was getting to expensive replacing it every couple of months at 20$ a pop) and flare on the pipe so now its a piece of flex pipe and clamps.

Hopefully this video does some justice to what it sounds like. Well youtube decided to decrease the quality for some reason but here it is