covered

Dear Fellow Rider, My name is Gee. Ive recently joined to learn more about my new toy from fellow members. I got the bike a month ago, and it would bog down after 5000 or so rpm. Up tp about 4000 it had the power to burn rubber.... Things Ive done in order. 1. Checked battery off...

I have everything taken part on the carbs but I can't get the idle mixture screw out for the hole is covered. I know I could drill it out but would feel stupid if there was an easy way to get it out and not having to do that. I've attached a picture of what I'm talking about, how do I get that...