Can't figure out what is wrong with my 224 predator engine

j rod

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I have recently bought a 224 predator harbor freight crate motor.i have a munkuni v22 header, aluminum flywheel,racing plug, governor delete,125 main jet,oil low delete, and it's sluggish \ surging on acceleration,if I feather it I can get it to sometimes pick up only to hit a wall around 4k then crackling backfire type sound... pulling the plug it's carbon fouled but just on one side half the time.. I'm getting frustrated beyond words with this carb..
 

bob58o

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Or the irie of the Jamaicans. That don’t sound so bad. Everything going to be alright.

If you’re going to try to read a plug, it’s going to be tough if trying to read those AR3910X plugs or whatever. Even some of the most experienced plug readers are left clueless with those plugs. It’s only going to use one of those 4 electrodes.
 
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