Why did two-stroke little Mulan's motorcycle suddenly stall when riding?

There are many possible reasons for this situation. You can check whether the spark plug is broken or too much carbon is deposited, whether the high voltage electricity is normal, whether the burning engine oil is normal, whether the cylinder is stuck, whether the cylinder compression is good, whether the air filter, carburetor and exhaust pipe are blocked, and whether there are problems with gasoline and oil pipes.