The only adjustment that you can lean out would be the idle circuit. That would be done by adjusting the idle mixture screw(s) while monitoring the vacuum and or the engine rpms. To make a carburetor run lean would require changing internal parts such as the jets and metering rods.
Adjust carb on 400 Polaris 4x4 2stroke
Are you trying to go leaner or richer????
"84 is still the carb. There is a small screw right at the throttle cable on the carb. Adjust that.
there is a screw on the carb. be sure to adjust while the engine is running so you can tell by the idle when it is set properly.
there is a set screw on the linkage on the carb that will adjust it.
it's the screw right above the mounting bolt on the left rear of the carb. you'll have to adjust the idle screw as well as you lean it out. then check your timing again
adjust your idle screw on the side of the carb its the one with the spring on it. if that doesnt help then take the carb apart and clean it to make sure theres no dirt in it.
Adjust the throttle stop screw located on the side of the carb that has your throttle linkage connected to it.
adjustment screw is between throttlre linkage and carb body on the right side of the carb as you stand at the front of the car looking at the carb
with a screwdriver
twist the screw under the carb
Adjust or rebuild carb.