hey guys, lately every once and a while my 360 backfires when i turn it of. This usally happens when im going fast with the throttle all the way and then stop and turn it off. Is this bad. I do need to go get the valves adjusted though. Its over a year old so that needs to be done. Thanks.

 

sounds like ignition problem

 

is it more like a low pop instead of a "kaaabooom" mine does that and sometimes when I turn the key off the atv doesnt cut off immedately but revs again to a low rpm then cuts off.

 

Nothing to worry about.
What is happening is when you go WOT for long periods it will heat up the muffler a lot. Some small tabs or a weld tag will heat up red hot. When you turn the key there is no ign. to light off the fuel so raw fuel will cycle through the exhaust. When the raw fuel and air hit that red hot tag............bang!!!!
Is it bad? It's not too good on the muff.