The function of the motorcycle camshaft is to make some special changes and outputs through the protruding parts in a circular motion, so there will be frequent and intermittent impact forces. The motorcycle camshaft uses this change to open or close the valve. The speed is very high. Although the camshaft is only half the speed of the crankshaft, it is also very fast. For example, the idling speed of a single-cylinder motorcycle can reach more than 10,000 revolutions. At such a fast speed, the valve action will be triggered by the unevenness. Bearing a lot of reaction force impact, so the strength of the material is very high, often some alloy steel and the like, if the quality of the material is poor, it is prone to problems.

1. The motorcycle engine itself is an explosive combustion work, and the motorcycle camshaft is installed on the cylinder head. These temperatures are quite alarming, because suitable oil is required to maintain lubrication and reduce the temperature. If there is a lack of oil, such as the oil pipeline design is narrow, The camshaft may be damaged due to lubrication problems. The scooter itself is closed, and the heat dissipation is not as ideal as that of a cyclist. The oil should be replaced frequently to ensure lubrication and cooling performance. If the oil is abnormal, it is easy to cause high temperature damage to the camshaft.
2. The scooters are basically horizontal engines with small space. The bearing seat of the motorcycle camshaft is designed to be open from the convenience of disassembly. It is not an integral cylinder head, so there is a gap fit problem, and the hole position Both machining and assembly are prone to deviations. If the assembly or maintenance process is not standard, the upper screws are too tight or too loose, or some impurities, etc., will cause the bearing to be unbalanced, and the raceway will be deformed and damaged due to the pressure and grinding of the balls.
3. Of course, the quality of bearings is also very important. Heat treatment is very important. There are too many inferior products in the market. Cheap small pedals often use products of poor quality. bad.
4. In normal use, the motorcycle camshaft will of course be worn out. After all, it is an occasion of high frequency, high pressure and high temperature, but generally adjusting the screws on the rocker arm can meet the requirements. If the camshaft is replaced, it is necessary to remove the cylinder cover and The valve rocker arms have these, and the timing needs to be readjusted. When repairing and replacing the camshaft, it is necessary to act gently, use a balanced force, and do not enlarge the hole of the bearing seat.
5. The scooter does not have the problem of high-end and low-speed, but it should not be too low to idle, so that the oil supply cannot be in place, and it may be due to the excessive speed fluctuation, the motorcycle camshaft is shaken and worn out, the bearing is deformed, etc. In addition, the valve clearance is also To be adjusted according to the standard.