Using of pre-drawing, extruding holes and shot peening techniques has shown obvious effect in extending the fatigue life of motorcyclechain.
用预拉、挤孔、喷丸等强化工艺来提高摩托车链条的疲劳寿命效果很明显；
2
The engine is completely new design of water-cooled chain machine, box and cover use compact structure, easy to install cross-country motorcycle.
全新设计的水冷链传动发动机，箱体和盖类采用紧凑结构方式，便于越野摩托车安装。
3
A new kind of detection method based on machine vision to measure geometry size and roundness error of external chain board of motorcycle roller chain is put forward.