Carburetor idle mixture screw questions

[shinyribs]

I discovered that some of the roundtops have solid tipped idle mixture screws and so
e have holes drilled sideways in the tip. What is the difference and how do you tune them? I'm assuming they would not tune the same.

[Lucky 1]

It was an attempt to prevent the owner from richening the mixture.
Fill in the hole and the mixture will be fully adjustable.

[newtothis]

sny ribs,

 i am interested could you explain more, i have a 81 cb 750 f, and think i maybe haveing the same problem as you thanks

[shinyribs]

Hey bud,the roundtop carbs I'm talking about are the 69-76 carbs. But what problem are you having?