Cylinder not firing
Well, since it's been nice out I've just been riding my bike instead of selling it and fixing a few things that I never got around to before.
The PO never changed the air filters so they were in a sorry state. I recently changed them (OEM and they came pre-oiled) and now I am losing my front cylinder on idle. Since I've been traveling, I drained the bowls and filled them with seafoam for a week. Got back yesterday and it is still doing it. Here is all I know/done:
Bike starts right up and climbs in idle like normal for 30 seconds or so. If I don't touch it, and it stays at 3000 rpms, all of a sudden it drops to 1100 and the front cylinder (which was firing) now stops firing and I can smell gas. Bike has new NKG plugs and the carb screws are 2.5 turns out. Battery seems fine.
The front spark plug wire test is a little confusing to me so I haven't been getting any results on that.
Any thoughts? Grounds are tight. Did a test at night and it didn't arc. I am leaning towards a carb issue, but why would the idle jet work for a tiny bit then stop without any application of throttle?