NO No That is not the air/fuel screw. The screw is just below the vacuum hose. In the picture of the left side the hose clamp is covering it. It faces downward.I took a few pics, I believe the air-fuel screws are the ones above the hose with a cap that has a greenish tinge, but can never be too sure so I'm posting pics for verification. Thanks!
Very Thin. There is about a 1/8 inch gap ( maybe a little more ) under the cap between the screw. I used a very fine drill bit ( taped to only allow 1/8 inch depth hole and drilled a small hole in it. I then plucked it out with a sharp awl . Some have said they have screwed in a small sheet metal screw and just pulled it out. Just don't go too deep.Well I just went out and tried to pop off the correct caps this time. No luck... The small round silverish (I'm guessing they're aluminum?) caps sit back in the opening so that you can get nothing underneath it. I tried working on one side of it by hammering a small flathead screwdriver hoping it would pop the opposite side out but no luck, instead it just scored the cap which I was able to get a bite to pry but no luck either!
How thick are these caps?
Here is one suggestionany idea where you can get replacement adjustment screws for our carbs, in case you strip the threads? Why didn't they just make these hex bolts... Well, I guess because they don't want you screwing with the adjustment of the carbs. Hence, the lead filled cover... Am I arguing with myself again? I hate when I do that. Never can decide which side to take...