popping on decel. lean jetting?

[the fat kid]

hey folks im pretty sure its lean but how do i know what jet(s) to change and to what size. ive got a dg slip on, pro flow w/ k & n and its jetted, lid off, im at 650 ft elevation... any help is appreciated.

[450rJam]

check for exhaust or intake leaks

[the fat kid]

actually, on that note i do have a space on my exhaust where its a lil darker i suspect from carbon deposits, so that could be whats causing it? what do i do to fill the hole or gap.

[450rJam]

if its at a joint try some high temp coper sylicone (sp)

let it set up overnight

[DVXDUDE]

does it pop every single time you let off the gas in any gear?

when i was jetting my bike mine would pop on decel in like 4th or 5th gear when im really going. I decided to bump up to a 160main and i noticed it pulled a lil harder in 5th gear and it hardly ever pops now

plug is a nice brown colour too

[the fat kid]

yeah every gear nearly everytime, but it didnt do it when i first bought it, idk that was in feb.