I have noticed that a lot of other bikes out there do not have that "gurgle" when letting off the gas to shift, or on decel, however, mine does. It's not decel popping, at least not the kind that sounds like an occasional backfire or loud pop. I also noticed this with the previous mufflers.

Can anyone explain what that is and if there is anything I can do to make it go away?

It's a carbureted 2001 RK, 98CI, 10:1 compression; exhasut is dual headpipes with Fuel Moto Jackpot 4.5 Pro Touring mufflers. I have Andrews 37G cams to install, just have not installed yet.

 

I believe it is caused by running rich at idle, the excess gas is burned in the exhaust. Here in AZ I took it in for a dyno (not the only reason) and had it set rich at idle so yes when I let off I get gurgling (I like that) and even popping.

Want it to go away lean it out.

 

Ok. Thanks for the info. I wasn't sure if it was just my bike, or the cam setup or something else. I don't mind it too, much, I just think it's a bit much.
EDIT: Instead of changing the pilot jet, I could try turning in the mixture screw, right?

 

I tried turning the mixture screw in, the bike starts to run rough. I don't think that's the case with my bike. May be something else. Need to get those cams installed.