SX/SXi/SXi Pro why are these holes plugged on these carbs

Oil feed lines, obviously blocked off when changed to premix. If it runs better, then your jetting is way rich. You are risking seizure with them open
 
Plugged it hesitates just revving it on the stand and in water. You have to keep it above 25% otherwise it just dies. Unplugged it braps like it should on the stand havnt tried it in the water
 
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