Where is the mark on the crankcase when the pedal 80 motorcycle assembles the cylinder and cylinder head?

There are many kinds of scooters, including 80 pedals. Although the position of the timing mark on the crankcase is different, the method is basically the same, usually a protrusion or notch on the box body. Refer to the following two pictures. In addition, when the timing is correct, the piston will be just at the top dead center. It should be easy to find the timing by combining the T-dotted line position and the piston position of the magneto.