Some helmets offer added conveniences: such as vent equipment, face shields, ear protection, intercom, etc. Generally, there are two types of helmets: winter helmets and summer helmets.

1. Some of the foam cushioning materials of the helmet have very low density, and they are not even comparable to the foam cushions used for household appliances.2. Some materials are uncomfortable to touch, so pay attention to the choice.3. Be careful that the black heart small factory uses recycle

Motorcycle power devices use internal combustion engines; people use diesel-fueled engines as diesel engines, while gasoline-fueled engines are called gasoline engines. Because gasoline engines have the advantages of light weight, small size, low noise, low vibration, easy starting and low cost, mot

I believe that friends who know motorcycles know that if the motorcycle burns oil, it is definitely because the piston rings and pistons are worn out. Basically, as long as the motorcycle has the phenomenon of power drop and oil burning, maybe this means that there is a problem with the piston ring.

FrameWhether a mountain bike is comfortable to ride, whether it is light and easy to control, how strong it can withstand, how long it can be used, whether it can be upgraded, etc., the key is to look at the frame.Frames are roughly divided into two types: hard-tail frames and full suspension frames

The piston ring is an important part of the internal combustion engine. It mainly plays the role of sealing. If there is no piston ring between the cylinder block and the piston, then they will be slack and weak, and the engine cannot have sufficient negative pressure in the cylinder, so Piston ring

A motorcycle engine is a machine that ignites the fuel mixture entering the cylinder and turns the heat energy generated by its combustion into mechanical energy, and the crankshaft transmits the power to the rear wheel of the motorcycle through the transmission mechanism to become the driving power

Many people think that installing the piston rings of a motorcycle is very simple, just plug them in in order. It is estimated that after reading this sentence, some people start to curl their lips. This is very simple. I have been repairing cars for more than ten years, and they have been plugged i

1. The national patented product starts instantly and solves the blind spot of lighting from a more cost-effective basis. Special material to solve the problem of high temperature heat dissipation.2. LED universal integration, easy installation, 98% vehicles can be installed.3. The LED patented 360-

The quality of the helmet - the material of the helmet shell shell1. The most common is ABS resin material, such as Taiwan brand Chi Mei. This is an engineering plastic with strong impact resistance and good dimensional stability. The market price of this material helmet: usually a full helmet is be