Kayo Bull 200 Carb or A/F ratio adjustment

[Driver72]

Hello all,

First post here. I bought two Kayo Bull 200's for my sons.
We've had them for about 3 months. I really didn't ride them much as I have a larger ATV for myself.
But yesterday I rode both my sons ATV's and noticed one of them didn't run quite as smoothly as the other. I tested the top speed of both and one went 39 mph in a two block period without hesitation. The other went 37 mph but took an extra block to get there and hesitating a bit.

Research told me that if an ATV with a carb bogs its running lean, if it sputters or hesitates while accelerating it's running rich. So it appears this one is running rich.

Anybody got pics of the A/F ratio screw on the Kayo Bull 200?
Which direction do you turn the screw to make it run more lean?

Thanks