The spring is bold, and the spacing between the springs can be adjusted. The car we designed previously runs after a while, and the spring is compressed after the spring fatigue, it is compressed, Causing the entire engine to swing, it is easy to cause the cylinder head bolt fracture. Now we are here to strengthen it, which plays a very good role in reducing the cylinder head bolt break play a very good role. In addition, the other is our starting bar, Generally said, we and the general manufacturers do not use the same. We use the 45 steel for queued and temporarily, which can ensure that under the frequent start many times, Does not cause the engine output shaft and start the rod gap and shaking. This is our first advantage.