Or you could remove the air cleaner on the offending side (found by releasing one plug wire at a time until you find the dead cylinder) then rev the engine to 2K rpm and slap your palm over the dead cylinder’s velocity stack while letting off the throttle linkage. That will often suck any crud in the jet/passages/transition ports through and clear up the stumble. If it’s stubborn and doesn’t clear with 2 or 3 tries, then go to plan “B” and blast out the passages and ports with aerosol carb cleaner or compressed air.
I did this for John Estes one time at Carlisle and it worked like magic. I tried it on Pearl when Chris had it for a weekend and it didn’t clear the stumble but THAT was caused by a broken mechanical part. Still, it’s easy and worth a try when out on the road.