83' Kz1100 #3 cylinder not firing/backfiring

Having issues trying to get this #3 to fire. I got spark, compression, and fuel. I've cleaned the carb twice and soaked "death juice" as well. The only thing that I didn't pull from the carbs is the plugs that cover the idel mixture screw and pilot jet. Could it still be dirty and cause my backfire issue? Plug is looking lean but still getting fuel. Tried throttling through the carb circuit to see if it improves at higher rpms but still backfires. Could it be the valves? Backfiring is coming out the exhaust, not the intake.

Bump

you can try switching the spark plug wires on #2 and #3 cylinders. If it's ignition 2 won't fire, 3 will. If that doesn't work, check valve clearances. Is #3 exhaust pipe getting hot?

don

Nah exhaust is cold, that's how I can tell it's number 3. I'll try switching the wires and see what happens. Thanks!

Carb is confirmed clean. Switched the wires with no effect. On to the valves I guess.

Will #3 fire with application of starter fluid spray?

Good Fortune!

Patton wrote: Will #3 fire with application of starter fluid spray?

Good Fortune!

Kinda hard to tell. I was able to choke the #3 carb with my hand and got it to smoke pretty well but can't really tell if it's firing. Kinda stumping me pretty hard. I'll try and shoot a small vid and maybe that will help the trouble shooting process. This is really my first time wrenching on a 4 stoke bike, My background is more of single cylinder 2 strokes.

Ok I attached a video to help. For some reason it's upside down but you can still hear it popping. Let me know what you duders think.

Ok, that didn't work. I'll try again later

Phil N. wrote: Ok I attached a video to help. For some reason it's upside down but you can still hear it popping. Let me know what you duders think.

Ok, that didn't work. I'll try again later

Pilot circuit not feeding fuel...a guess.