When we drive around the outdoors in our Mercedes,
It's a very enjoyable thing to do,
A motorcycle is like a companion.
Always by our side,
There's a little bit of a problem,
You also need to do maintenance,
A lot of people don't look at the production date or shelf life when they buy a helmet and buy whichever looks good. This is wrong, helmets also have a shelf life, when buying helmets must pay attention!
Engine valve mechanism directly determines the performance of the engine, and the valve in the whole valve mechanism is a crucial component, so when the valve gap changes, the performance of the engine will be deviated.