It's more like a sneeze, and it happens when give it more throttle sometimes. I believe everything on the motor is stock.

 

Is the fix a secret?

 

Mine does the same thing. I bought the bike three months ago, it when throttled all the way down as in going down a hill....or freewheeling, it .

will pop intermittently...But also you have to watch it when puling out at low throttle due to the "sneeze".

I've had several people tell me it's got bad gas, but I've ran 5 tanks of 93 octane thru it so far

It's the Anniversary Model
EFI
Stock Breather
Basoni (think that's how you spell it)power curve pipes, with factory mufflers.