Motorcycle accelerator screw position

In the plunger carburetor, most of the screws are located at the upper throttle of the carburetor, and there are many on the right side, which are half buried in the carburetor. In vacuum film carburetor, the screws are mostly on the right side of the carburetor, which are easy to touch along the throttle line, mostly obliquely upward or upward, and the screws are relatively large and completely exposed.