Pooping on the decel

[BigBRaptor]

Hi just added the K&N clamp on with a gutted pipe and am getting some popping on decel. When I say decel I mean running all the way up to the top and letting it coast down to a slow speed with no clutch. It is a 2006 raptor 350

Main jet- 150
Pilot jet- 25
Needle is stock position
Idle is 2.5 turns out

 

[alex456123]

Plug chop at idle, mid and wot. Should give you an idea of where in the throttle range its running lean.
Oh, I really don't think a quad should be pooping.....