I swore I wasnt going to make the first thing I post a question but here it is.   I have a 29? inch cone on the bike and it runs fantastic.  Somebody had it straight piped before me but I redid the bike and now I have a question because I cant feel out singles.  The bike will do a huff more than a pop when i turn it off, already learned thats normal from reading, it wont decel pop warm whether it is shifting or a hard downshift.  Its a pretty tame exhaust note.  What gets me is when I really jump on it meaning WOT or close, I'll shift up to 4th hearing nothing but a nice pur then when I let off i hear a gunshot from the exhaust.  Is it lean or is that normal?  Id call lean if it were popping at other times but its only after really hard accelerations.

Anyway, Here's a pic of the bike after I finished with the first stage.  Over winter I have a bunch in store for it.

Worth mentioning i tested it with incense and there is no exhaust leak.  Shes all sealed up.

Thanks in advance.

I believe your WOT runs are doing 2 things:

1)  The hard acceleration is making the exhaust header hot.

2)  Rolling off the throttle creates a fuel/air mix that is too lean to ignite in the cylinder - so the unburned fuel/air is pumped out the exhaust valve and into the header.

When you make your WOT runs - don't just chop the throttle closed when you have reached your speed limit....instead slowly roll off the throttle and don't allow the throttle to close completely.  Leave the throttle open just a bit to allow some fuel to flow into the engine.

When the engine is at high rpm and you close the throttle completely, the slide drops and closes off the fuel flow from the needle jet/main jet - so the only fuel going to the engine is from the idle circuit.  The high rpm and close throttle butterfly creates a very high vacuum that pulls a lot of air past the closed throttle plate - but the idle circuit cannot flow a matching amount of fuel.  The mixture becomes so lean that the spark plug cannot ignite the mixture - but the hot exhaust system can create a condition that ignites the fuel/air in the exhaust.

That cone muffler you have is not a bad muffler on a stock engine - MMRanch used that muffler for several years on this bike and it worked well.  If might be a bit restrictive for maximum performance at higher speeds - but it worked fine at cruising speeds.

I have that same muffler. I installed it because I wanted something on the quiet side, but it's become a PIA. Every time I need to remove the rear wheel I also have to remove the muffler. Mine has also developed a rattle (something is lose inside) so this winter it will get replaced with a short muffler. I'll install RYCA's adjustable baffle to get the sound that I want.

Oh, and Dave is correct on the cause of the pop. Notwithstanding, I'd go up one jet on the main and make sure the TVEC circuit is clean.

Sounds like you got good feedback on this one.  So, just an off-topic question...
The back end of your bike looks really tall.  How long are those shocks and are you able to keep a reasonable balance of belt tension as the swingarm moves?