Shortcut made a good suggestion........check for air leaks on both the intake and exhaust........very often the culprit off backfiring problems on decel.

 

i never had that issue..i got about 113 miles on mine..runs mint..oh about the starting ..i noticed if you hit the gas while trying to start it ..she will start hard..just start it with no gas...

 

I will make sure the dealer checks all the intake and exhaust for leaks. I hope this dealer can. they tryed to tell mewhen i callled to set up the first service that most quad required oil changes ever 10hrs / 100 miles. I disagreed with him and clarified I was not talking about the first service. He was positive most quads required an oil change every 10hrs. I hope these jokers at the dealership know what they are doing.