Engine Backfire!!!!

[Chryco Psycho]

usually that i scaused by lean mixture or lack of accelerater pump shot

[JRoss22]

Thanks and now how do i go about fixing that? I kinda dont want to screw up anything in the process.

[Chryco Psycho]

check to see if that is th problem first , if it is then you need to by a kit & rebuild the carb 

[Bullitt-]

Can burnt valves cause backfires? I used to get lots of pops/backfires before replacing my heads, the old heads had burnt exhaust valves.

[Chryco Psycho]

yes , but an exhaust valve cannot cause a backfire into the carb, unless the exhaust valve is not opening due to a worn cam or broken pushrod , either of these is a much more major problem , lets try the easy problems first   

[tactransman]

You can always resort to the good 'ole compression test.