Definitely sounds like coil or condenser breaking down with heat causing the engine hiccups. I've seen that many times with autos too. As for carb cleaning, the Pine-sol treatment (50/50 with hot water) works very well. Used that trick on my old Evinrude outboard with ancient 2t fuel in the bowl. Not necessary to remove the jets. Just rinse and blow dry after soaking overnight or 24hrs.
Hope all the advice helps. You've got a neat bike there.