coil problem?

Backfiring through carb may result from too tight intake valve clearance. To increase valve clearance open carb drain untill engine miss is gone.

Good Luck!

Backfiring through carb may result from too tight intake valve clearance.

Good Luck!

hey everyone,

so the bike is a 1979 kz650 B (4 cylinder). it was running perfectly fine until i took it apart now it's running very oddly. when it first turns on it runs fine, then it heats up and it still runs alright, then i take it out for a spin and it starts to sputter through the #2 carb (gas starts to come out through the intake side). from a stop it sputters a lot more until it gets to just above 3k or so rpm and then it runs just fine. if i leave it it'll sputter until it turns off. i replaced the points, condensers and spark plugs and after that still didn't fix it the plugs for 2 and 3 are carbon fouled.

does this mean that it's most likely the coil that runs 2 and 3 that could be bad? when i first assembled it that same coil got really really hot, too hot to touch. could it have overheated and gone bad?

thanks in advance for all the help guys, i appreciate it.