KX85 problem, NEED DIAGNOSIS

[KX85]

Hey thank you for reading my post, i have a kx85 (2006), and one day i was riding it and it sounded normal and everything, but the next day when i went to start it up it sounded kinda weird. It is slightly louder than normal, when its running without choke it rides and sounds like the choke is on, it bogs (a lot), and when i rev it i here the rev and the when it like half way dies down there is another like oewwh sound kinda like an airplane coming in or a synthesizer effect. I know 2 strokes are supposed to do this but that sound it a lot louder than normal. Also, when i rev it i kinda here the engine from like between the radiator and gas tank, is that normal? Thank you for your time and consideration

[AJ_YFZ]

Your headpipe may have came loose or it may have a hole in it

[KX85]

OK thank you!