For what it's worth, here's a quote from a Mikuni Tuning Manual:

 

would it be the same idea with stock? only it is louder and more noticeable with aftermarket systems? cause i have my stock one drilled out and you can def hear it when you let off the gas and let it slow itself down

 

aye ive seen alot of posts of people worrying about decel pop... if the bikes runnin lean you'll know it (especially a 250). mine pops on decel but rips so i never worried about it.

 

I was kinda worried about the decel pop from my bike until I heard the the decel noise from divodaves bike. Now his bike is loud, it sounds like a machine gun.

 

It is because of the decrased back pressure and the increase in flow. Like the OP a lean condition will exaggerate the situation.

 

I always thought that the popping will always be there, you just hear it on performance exhausts due to the straight through design vs. all the baffels and what not on the stock exhaust that eliminate it. I could be wrong though.

 

That is correct. Like stated before, since there is less back pressure and increased flow, there will be more backfiring.

 

Wish I had said it...


"It's a friggen motorcycle, it's not supposed to be comfortable, quiet or safe. The windnoise is supposed to hurt your ears, the seat should be hard and riding it should make you sh*t your pants every now and then. Suck it up". -- Scary Gary Mc

"The slowest component of most motorcycles is the rider". -- P. Bonner

 

their isnt much more you can do to go faster if its always WFO - Jsac

lol