How to deal with Foday pickup when it starts the throttle?

Foday pickup has an open throttle. Unscrew the fixing bolts and nuts of the air filter, open the filter cover and take out the filter. Unscrew the fixing bolts and nuts of the air filter, open the filter cover and take out the filter, so that you can clearly see the opening and closing of the throttle valve driven by the steel wire rope. First clean the throttle valve, open the gear cover, take out the middle bridge, add engine oil to the shaft, and then replace the gear. When you pull the major back and forth by hand, you feel stuck in the process of rotation. When you take off the middle gear again and observe it carefully, you find that several teeth are worn, so you rotate several teeth counterclockwise to avoid the original position, and then pull the page back and forth to eliminate the stuck phenomenon.