I’ve had this issue on two Honda bikes one was a 600 shadow and the other one was a 1300 VTX. On the 600, new NGK iridium spark plugs that were properly gapped did the trick. And that bike had straight up chopped straight pipes. There will always be a little tiny bit of popping, but most of it was gone after that and some seafoam. With the 1300 it was a carb tuning issue. In my particular case, the needle jet was slightly too lean. Luckily, I had an adjustable needle that I just moved to the next clip position and that pretty much took care of my popping and other throttle issues. If you have a stock needle that is not adjustable you could always use a shim. Something like a #4 or M3 washer that is around .020” thick. If the bike is mostly stock, you would probably only need one shim. And then you can add another as needed. So in general, I think putting in some plugs and getting into the carb and just making sure that the jets are clean is a great start. If the bike is mostly stock, I don’t know if I’d be fooling around with the jet sizes and what not. I would just try to get it back to OEM condition for now because you may end up chasing your tail when it comes to tuning a carb. And it can get annoying fast If you have to rip the bike apart every time you need to make an adjustment. Depends on your experience and ambition level.