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The A.I. is removed, that's the plugged holes next to the spark plug right? Yeah, they have been removed.


Yep.. thats a good thing.. pipes blue if you don't get rid of that.

172 jets are really big jets, shouldn't really need that much fuel.I think most with the freak set up go 160 max.
Yep, be sure to check the carb boots and manifolds for air intrusion between the carbs and head.