Bydf3 throttle cleaning course

Hello, dear! Maybe it's the throttle line. It is also possible that there are too many impurities in the intake branch of the engine, which leads to the throttle valve not being able to control the intake air well. Replace the air filter, unplug the hose connecting the air filter and the engine, and you will see a damper in the intake pipe of the engine. Get someone to step on the gas pedal and the damper will open. Wipe with a clean cloth to see if there are impurities or dirt. If yes, spray the carburetor cleaner on the dry cloth first, then clean the dirt inside, and finally connect the hose to the air cleaner.