BrianK said:
Any problems idling? Popping on decel usually means too lean in the slow circuit. Had this recently on an airhead that had sat for a few months - idle jets gummed up.
If yours is truly "backfiring," this could be the reason. Or not.
No idling issue, 1,000 all day long -
ebowling81 said:
jsouthard said:
The backfire is coming through the exhaust not the intake.
I'm running a single mikuni with a boyer elec ign.
You are either running to rich on the carb then, or you have a leak near the head. Check to make sure that you have both exhaust collars tight. If they are not tight, that is probably the issue. This is probably the case if it is only occuring on one side or the other, since you are running a single carb set, so that make diagnoses easier. Otherwise, I would say that you are running rich, and should check your carb settings.
Exhaust collar is tight. I thought of that and had found a crack on the exhaust header. I replaced both the headers, peashooters, and bought the new CNW header nuts.
I will check the Mik again. It just isn't operating rich and doesn't smell gassy or foul the plugs?