What's the difference between top dead center and ignition timing of motorcycle? How to adjust it?

1, hello! The piston and cylinder of motorcycle are aligned, that is, the top dead center.

2. The symbol T on the flywheel is used to indicate the ignition time. When the linear piston turns to the T-shaped top dead center, the valve can be adjusted.

3. How to adjust depends on the car. General valve clearance (0.06 mm-0.08 mm) to Jialing 70 and Honda 125.

4, hope to adopt. . . . thank you