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05 Backfiring/Jetting?

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Hey guys. I was just wondering if anyone had any quick input on jetting for an 05 with a FMF Factory 4.1 exhaust with a power bomb header. It pops on decel and already has a JD Jet kit in it. Would it just be easier to call FMF or do I just screw around with the jetting until it finally works.  Thanks for the input.

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What are your current jetting specs? 

 

You should be in the ball park of 

165 main

42 pilot

Red needle, 3rd-4th clip position

35 leak jet

 

Richen your needle one clip position and see if that helps.

 

It is pretty normal for 4 strokes to backfire slightly on decel.

Edited by BDubb106

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If your head-pipe to muffler joint isn't sealed very well, it can also cause more popping on decel...

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