It is the chain, camshaft, rocker arms and valves that make up the engine's valve train. The effective cooperation of these components will ensure the normal combustion and work of the engine. However, in the normal operation process, due to the close contact between the parts, there will be some wear and tear, but these wear and tear are also called normal wear, so the wear of the internal parts of the engine is inevitable, but this phenomenon will definitely have a degree. If there is excessive wear, there must be a reason.

The main reasons for excessive wear on the motorcycle camshaft and swingarm are as follows:
1. Lack of lubrication, the camshaft and rocker arm of the motorcycle are basically lubricated independently. Both the overhead camshaft and the lower camshaft are lubricated by the lubricating oil in the cylinder head. Once the lubricating oil passage of the cylinder head is blocked or the oil supply is insufficient , it will force excessive wear on the camshaft and rocker arm.
2. If the clearance is too large, once the valve clearance is too large, it will increase the unnecessary swing frequency of the rocker arm. In this state, the contact surface between the motorcycle camshaft and the swingarm will be excessively worn, and there will be a crisp metal thump.
3. Excessive wear on any model is directly related to engine temperature if the temperature is too high. Once the engine temperature rises, the lubricating effect decreases, and then the parts in close contact strain, and the motorcycle camshaft and rocker arms are no exception.
There are many reasons why an engine overheats. If you eliminate some mechanical failures, it is directly related to the hard riding and the cooling performance of the cylinder head. Therefore, in actual riding, it is necessary to avoid long-term strenuous riding while ensuring the cleanliness of the cylinder head.
The above are the main reasons for excessive wear on camshafts and rocker arms. Of course, the quality of engine parts will also play an important role, because many times the damage to the camshaft bearing is caused by poor quality, so the quality of the parts will also determine the wear state of the camshaft and rocker arm. After the camshaft and rocker arm are excessively worn, the power will drop due to insufficient intake and exhaust of the engine. Therefore, in normal use, if you can feel the crisp sound of the engine, you need to adjust the valve clearance in time, clean the cylinder head, and add enough lubricating oil, which can effectively avoid the excessive wear of the motorcycle camshaft and rocker arm by some external factors. , prolong the service life of other parts of the engine.