1. There are two ways to adjust the light. One is to loosen the two screws that fix the headlight on both sides and move the headlight up and down. The other is that the headlight is fixed and cannot be moved up and down. This type of headlight can be adjusted through the adjustment screws at the back of the headlight, usually one on each side, one for adjusting the height and one for adjusting the left and right. There are also a very few adjustment screws located on the outer rim of the front of the headlight, such as some large cruiser motorcycles, and the adjustment method is the same as the second type.

2. Motorcycle lights have two functions: illumination and signaling. The illumination light is mainly used to illuminate the road ahead of the vehicle and also serves as a signal light (for overtaking at night). The signaling light is mainly used to alert other vehicles and pedestrians to yield. Therefore, the lights should be used flexibly according to the specific situation. When starting, the headlights should be turned on first to see the situation ahead of the vehicle and prevent accidents.