What are the adjustment standards for motorcycle headlight high and low beams?

[OElena]

Here are the detailed standards for adjusting motorcycle headlight high and low beams: Adjusting the high beam: The high and low beams of a motorcycle are generally determined by two filaments within the same bulb, so adjusting one will affect the other. Typically, the high beam should illuminate a distance of about 100 meters. Alternatively, you can use a wall 10 meters away as a reference, with the high beam slightly below the parallel line. Directional angle requirements: According to the geometric visibility requirements in the "Regulations for the Installation of Motorcycle Lighting and Light-Signaling Devices," the vertical angle should be 15 degrees upward and 10 degrees downward. For a single lamp, the horizontal angle should be 45 degrees to the left and right. For paired lamps, the outward angle should be 45 degrees, and the inward angle should be 10 degrees.