i know this has been asked a million time but i haven't herd of someone solving the problem.
i have a 2004 banshee and its miss firing out of the left cylinder. her is a video of someone else bike acting the same
here is what I have done so far. did a compression check it was around 100psi so i had the topend rebuilt,
put new read in v force 4s
pulled the carbs cleaned them. look for anything abnormal didn't see any thing, also pulled the carb of my friends running banshee and tried that.
tried swapping the plugs wires over, new plugs again and after that no change.
this is what has been done to the banshee. toomy t6 pipes, 280 jets, cut air box, im at sea level
bike ran fine with this until i parked it for a couple of months. my last trip was at Winchester bay and had no problems until i took it out the next time.