Explain 7 common motorcycle rear rocker arms from core stability (2)
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With the displacement and horsepower of the vehicle getting bigger and bigger, the 2.0 version of the square tube rocker arm is no longer able to do the job. The reason is that the overall strength of the rocker arm is not enough, and the assembled product has gap gap even if it is fine, and the year The welding technology and raw materials are not so advanced.
The one-piece triangular rocker arm was born in this period of time. It was also applied to the vast majority of public upgraded racing bodies of the year. It was also a popular star product in the past . The density is stronger and brings a new experience, but in order to leave room for the chain , The beam has to be thinned.
Thought this is perfect? In fact, there is a very big BUG. The designers of the year did not expect to be comprehensive. The metal material can withstand sufficient tensile force. In the face of intense driving, the pressure resistance is still insufficient.
"Give a very objective example, just as you can easily bend the iPhone from both ends, but you can't tear it from both ends."
Five, the lower triangle rear rocker 
In order to avoid the influence of chain and anti-stress as much as possible , the designers have inverted the upper triangle and improved it. Right, it is such a simple method. It is not developed until the upper triangular rocker is released for a few years. Performance on the body.
However, there are still some defects. Due to the shape of the rocker arm , the rocker arm shaft must be raised , otherwise it will be bottomed, oh no, the center axis (a joke), in short, if the high shaft is not raised, the force transmission will cause The impact, at the same time, the rest of the vehicle design location must be compromised.
This rocker arm design can be said to be the best design structure against pressure and tensile force in today's era. For cost reasons, most of the situations are used in the game situation.
Six, gull-wing rear rocker 
This design is also the mainstream civilian rocker arm structure in recent years . The overall strength, support force, anti-stress and so on exceed the upper triangular rocker arm .
Although there is a certain gap compared to the lower triangular rocker arm , it does not need to raise the middle axis of the rocker arm . In terms of comprehensive performance, it is undoubtedly the first choice for the comprehensive road condition. There are several daily driving situations on the mountain road, highway and track. The gull-wing rocker arm can be well balanced and the manufacturing cost is relatively low.
Seven, single rocker 
As the name implies, it means that the unilaterally own rocker arm , Ducati also gives the domestic fans a preconceived impression that the single rocker arm is Ducati's patent. In fact, many international brands use this design. For example, Augusta F4, Kawasaki H2, etc.
Some people say that this kind of design is a kind of product, just for the sake of beauty, it takes more budget than the double rocker arm , and the actual effect is not big.
Indeed, since there is only one side rocker arm , the cost price is higher than the double rocker arm in the material selection and design level , but in terms of practical effect, it does improve the vehicle handling and flexibility. 
The same car, from a single shake to a double shake, the original flexibility will be greatly reduced, some netizens may be too worried about the degree of solidity, this international brand car factory, before the vehicle leaves the factory, will conduct internal testing, some The test project is to test the working condition of each component under the limit state of the vehicle, so you don't have to worry about the solidity of the single rocker arm .
