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33. The top of the carb will separate from the base and look like this. A large screwdriver is used to remove the secondary jets. Because the engine was running slightly lean at wide-open throttle 13.5-14 air/fuel ratio, we wanted to give the engine more fuel when accelerating. We went from an 80 secondary jet to an 82 secondary jet and retested the engine. Turned out by changing the secondary jets we were able to add more fuel while at wide-open throttle and drop the air/fuel ratio to a richer and safer 12.5-13.