Hey, can any of you help me with this problem. Every now and then when i am going at a high speed and start to slow down my bike gives a crack. Now i think it man be the baffels . It also sounds like its coming from under the seat. Can any one thll me what my problem is. Thanks a lot

Chances are either spark plug or piston/ring clearance, you are probably having a back fire through carb under seat and that can be caused by a fouled plug that stays hot with carbon or ring clearance is done and gases are by passing into ignition, I would change plug first.

My buddies 2006 Sprortsman 500 EFI does the same thing.