Engine problem? Help.

[Tonarto]

Hi. 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 in other way I need to get bad credit loans to buy new bike. Please help. thank you

Edited November 14, 2020 by Tonarto

[dynax]

Have you checked you're getting a spark, and is there fuel going to that cylinder

[WD-40]

If you haven't done it as dynax said you could take the spark plug out and check if it's got spark. If it doesn't have spark you could swap the spark plug on the bad cylinder with a spark plug from a known good cylinder and see if the problem moves to the good cylinder. If the problem is still on the same cylinder as before swap the coil on the bad cylinder with the known good cylinder and see if it moves. If it's still not firing on the same cylinder I'd do a compression test and compare the compression on the bad cylinder to the other known good cylinders. If the compression is good I'd give the carb a clean.