125cc What kind of oil is used for motorcycles?

Add special engine oil, model 10W-40 engine oil.

Motorcycle is a kind of two-wheeled or three-wheeled vehicle driven by gasoline engine and controlled by handlebar, which is light, flexible and fast. Widely used in patrol, passenger and freight transportation, etc. It is also used as sports equipment. Generally speaking, motorcycles are divided into street cars, road racing cars, cross-country motorcycles, cruise cars, station wagons and so on.

The original motorcycle, a real model existing in Munich Science and Technology Museum, Germany, is the world's first motorcycle patented by Daimler in Germany on August 29th, 1885.

100 years ago, the gasoline engine at that time was still in a low-level and naive state, and the vehicle manufacturing at that time was still in the stage of carriage technology. Primitive motorcycles are quite different from modern motorcycles in appearance, structure and performance. The original motorcycle frame was made of wood. Judging from the wood grain, it is made by carpenters and the wheels are also made of wood. The outer layer of the wheel is covered with iron sheet, and there are several square wooden frames in the middle and lower part of the frame.

The engine is placed on it, and there is a small supporting wheel on both sides of the wooden frame to prevent it from falling over when it is stationary. Therefore, the car actually landed on four wheels. The engine cooled by a single-cylinder fan drives the rear wheel forward through two-stage reduction transmission of belt and gear. The car seat is saddle-shaped and covered with leather.

The working volume of engine cylinder is 264mL, which is only 1/5 of that of modern simple motorcycle. Speed 12km, not much faster than walking. Because there were no buffers such as springs at that time, this kind of car was called "bone shaking car". As you can imagine, driving on the stone street in the19th century is worse than execution. Although the original motorcycle was so simple, since then, motorcycles have been constantly changed and improved. 100 years ago, hundreds of millions of descendants of modern motorcycles have emerged.