Both plugs look the same so I dont see how the carbs are bad. I doubt both carbs have the same exact problem. I have no idea what could be causing this. My only guess is weak spark. New coil (old OEM ran the same), new stator (OEM and tests good), second Flywheel (Bought it on Ebay and I think there may have been a VERY faint rattle doutb its causing this but who knows).Oem CDI with the plug cut off and differnt connectors installed (I guess it could be a problem but I doubt it). It runs pretty strong now. On the road stabing the throttle it spins the tires pretty good through 2nd. Other gears come up with a plus 4. Plugs look good. Any suggestions. Should I just run it? Doesnt look lean.