There are generally two reasons for the phenomenon of sliding teeth: one is the wear of the starting gear, and the other is the excessive axial channeling of the starting shaft.
Motorcycle headlights brightness is not enough, first to find out whether the fault performance or performance problems, and then you can properly upgrade the light.
When the motorcycle rides for a long time, the engine generally has a phenomenon of too large or too small valve clearance, which usually affects the performance of the car