My 94 GS500 started to get boggy at idle and occasionally wouldn't rev but just putt at a sub-idle speed and then die. If I could compression start it on a hill, it would clear and run OK. This usually happened before the motor was fully warmed. Then it started doing it when warmed up if I let the the throttle fall to an idle. I'd have to keep blipping the throttle while at a stop light. Now it won't start, will start to catch, chug a few revolutions and die. Fuel delivery is good, floats are set correctly, carbs are at stock settings. If I put in a fresh set of plugs, it fires up but then sputters and dies. The spark is not a fat blue crackling flame, sort of yellow, but it's there. Could this be electrical? Corrosion buildup on a spade connector?
Checked the spark today and it was barely there. I think it's electrical, but where to start is the question. Both cylinders have the same problem, so it probably isn't a bad coil.