Out of the factory, the pilot screw is set perfectly and no adjustments are needed, you’ll likely only need to adjust it if you’re going to ride your ATV in high altitude region, have replaced the screw previously or you’ve made modifications to the engine. I will go through that process in more detail later. In case your engine isn’t running smoothly when the throttle is partially open (1/4th to 3/4th), you will need to adjust the jet needle. Turning the pilot screw clockwise will increase the idle speed and turning it anti-clockwise will decrease the idle speed. The pilot screw (aka throttle stop screw) is the easiest to adjust, it is located at the bottom of the carburetor. You do not necessarily need to completely disassemble and clean the carb (Although, regular cleaning of carburetors is a good practice) Engine bogging or sputtering at idle? Or dying out as you increase throttle? Some simple adjustments can fix your problems.
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