Idle adjustment screw

#1
Hi guys, so I just got a new massimo mb200, I think the idle is a little too high. I went over the manual and there is a page showing that u can adjust it by turning a screw but I'm not sure if I'm looking at the right screw. can anyone confirm if the black plastic screw on the carb the right screw? I also heard some people said that the stock carb doesn't have adjustable idle so is that true? Thanks for any help.
 
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