Hey,
I have a 2000 honda cbr600f4 and one piston isnt firing. Its the piston on the far left when you are sitting on the bike. I have cleaned the spark plugs. Im not sure if it is the carbs or the plug coil or maybe the carbs just need to be synchronized, im not sure. You can see that all carbs are getting fuel but when you give it throttle at idle the bike makes a girgiling noise and it sputters then goes up on the rpms. It isnt as bad when it is warmed up but you can feel the exhaust pipes and all of them are hot and that one on the far left is just warm. I unplugged the plug coil on that piston and it made no difference so it seems as if it were not getting any spark atoll. If you could help me it would be really appreciated. Please help. thank you