i had to put a new crank in and go 0.30 over so i bought a new noss w/19 cc domes. the problem is the right side back fires while the left side seems to be fine. i used the advise i read on the hq and switched the plug wires with no change, also i switched carbs, no change. i switched reed cages, no change. both plug wires have spark and the carbs are set the same in every way the book (clymer & yamaha service manual) specifies. what am i missing? fyi my banshee has stock carbs except for the tors removal kit with 280 mains the needle is in the 4th pos. running turbo blue at 30:1 w/926 . toomey t5's at sea level and sport port if that matters. i know you guys can help me, this is all i think about and it is going to be the death of me please help