3. INSPECTION/ADJUSTMENT LIKE 50 2T ENGINE Throttle Stop Screw BODY At High and Low Speeds The engine must be warm for accurate idle speed adjustment. Adjust the idle speed to the specified range by turning the throttle stop screw and air screw. Idle Speed: 2000100rpm Air Screw Air Cleaner Remove the air cleaner cover by removing the seven bolts cleaner cover screws. Screws Remove the air cleaner element. Air Cleaner 3-9