Neither "feet" nor "muffler" can be used forever! What is the expiration date of retrofit parts of a car that you do not know unexpectedly (1/2 page)

First of all, the harmonic drive that hears the line "I can not use it anymore because it came off". The bottom line is that it can't be used forever, and its deadline is case-by-case. However, "depending on how you use it" seems too unfriendly, so let's list the approximate timing and symptoms that can be used as a basis for judgment.

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If the main product is a city ride and does not run on the circuit frequently and is sold by a manufacturer with reliable quality, 5 years or 50,000 km can be considered as one of the guidelines for life. However, the deterioration progresses as the distance and the number of years increase, and it is not the reason why the performance suddenly drops from 100 to 0. If you feel that the ride quality has become uncomfortable since it was new, or if you experience any anxious symptoms such as abnormal noise, you should deal with it as soon as possible.

Visually obvious symptoms include oil leaks from the damper, scratches on the surface of the piston rod, and cracks in the rubber bush. If you leave them unattended, not only will they not be able to demonstrate their original performance, but they may also lead to even greater trouble, so be careful.

In addition, if you use a poor quality product or use it too rough, the damper may come off in a few months, or if you ride a curb strangely on the circuit, the rod may bend by itself. If you're worried, remove the tires regularly to check for damage, or if it's difficult to make a decision, get help from a pro shop that is familiar with the suspension. Also, if you are a famous manufacturer, you may be able to handle overhaul, so it is ant to consider that.

Next is a muffler, which is one of the standard menus. It doesn't use oil like metal and harmonic drive, but its biggest enemies are rust and deterioration of the silencer inside the silencer. Even though it is stainless steel, rust is generated from dirt and scratches, and if left unattended, corrosion will progress steadily. In particular, the snow-melting agent is made from sodium chloride and calcium chloride, and adheres to the lower part of the muffler, causing rust.

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Expiration date is also case by case, but it is a common usage except in snowy areas, and it seems that 5 years is okay if it is made of stainless steel. Even with a new warranty, some manufacturers set it within 3 years and 60,000 km. If you clean the underside of beans or store it in the garage, the life will be extended, and if the circuit that uses a lot of high-speed range and the exhaust system becomes hot is not everyday, it will burn easily and pass the safety standard. It is unlikely that the sound will be at a level that cannot be achieved. Depending on the environment, there is a good possibility that it can be used for 10 years and 15 years instead of 5 years.