The wear of motorcycle sprocket is divided into the following two reasons:
1. The material of the sprocket is not easy to cause wear and tear. The general sprocket is made of 45# steel, and the hardness is HRC 40-45. That is, the surface hardness is increased by heat treatment.
2. The change of the transmission ratio of the front and rear sprocket should be determined according to the road condition of the car you drive. If you are driving on the flat road in the town, the transmission ratio can be reduced to improve the speed and acceleration performance. When used in towns, the transmission ratio is about 2.6 (the rear sprocket except the previous sprocket).
That is 15:39, or 16:41. Generally, if the car of 125 is used in rural mud road or mountain road, the transmission ratio can be changed to 15:41 or 16:45.
