Huzhou Daixi Zhenhua Corporation (HDZ), a private company

Tool Car

Tool Cart

Huzhou Daixi Zhenhua Corporation (HDZ), a private company

Rv Products

Rv Products

Huzhou Daixi Zhenhua Corporation (HDZ), a private company

our products

  • Motorcycle
  • Manual Tool Cart
  • Electric Tool Cart
  • RV Products
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Welcome to
Huzhou Daixi Zhenhua Corporation

Motorcycle &
Tool Cart

Zhenhua Tech & Trade Co., Ltd is

China Motorcycles Suppliers,Electric Bikes and Agricultural Appliances Manufacturers

,We manufacturer variety of motorcycles,electric bikes,auto parts,garden equipments,and other products.
About us

Our company is located in 104 highway, Daixi Town, Huzhou City, Zhejiang Province, where is 1 hour away from Hangzhou, 2 hours away from Nanjing, and 2.5 hours away from Shanghai. Our company has more than 500 employees, including 76 technicians and engineers. Our factory covers an area of 110,000 square meters, with 80,000 square meters of production area. We are equipped with 400 different kinds of specific devices with strong technical development ability, and quality control ability.

  • Customization
  • Good Service
  • Multiformity
  • High Productivity

News Centre

  • How to check and judge the use of spark plugs

    Remove the spark plug for inspection. According to its combustion status, it can be judged whether the spark plug is matched and the working state of the engine is normal.

    Good: the surface of the spark plug is clean, the color of the electrode is brown, yellow or yellowish white

    Carbon deposit: The surface of the spark plug is black, with carbon deposits or oil stains, indicating problems.

    Overheating: There is ablation spot on the surface of the spark plug, the color is grayish white, indicating a problem

    What is a resistive spark plug:

    Resistive spark plug means that a 5 ohm ceramic resistor is installed inside the spark plug, which can effectively reduce the interference of the spark plug to the automobile electrical appliance, avoid interference with the radio, and protect the computer board on the EFI vehicle from interference. damage.

    Numbering method for spark plugs:

    For example: F6RTC

    RTC indicates the characteristics and main dimensions of the spark plug

    F indicates the type of spark plug structure;

    6 means that the spark plug calorific value is 5-6-7-8, indicating that it is hot to cold;

    R is expressed as a resistive type;

    T is expressed as an insulator protruding type;

    C indicates that the center electrode is nickel-copper conforming to the electrode type;


  • Basic knowledge of spark plugs

    1.Working environment of spark plug:

    The working environment of the spark plug is very bad. It must withstand repeated and severe changes from normal temperature to 2000-3000 degrees Celsius in the engine. It must withstand the voltage of 20000-30000 volts. It must withstand the explosive force of 50 kg/cm 2 and be able to withstand gasoline. Or chemical corrosion of gas.

    2.The heat value of the spark plug:

    The heat value of the spark plug represents the speed of heat dissipation. The higher the value, the faster the heat dissipation (the cooler the spark plug). Different engines require matching spark plugs. In general, small cars have fast driving speeds, high speeds, and high cylinder compression ratios require the use of spark plugs with high heat values (fast heat dissipation), while large cars have the opposite, requiring the use of spark plugs with low heat values (slow heat dissipation).

    3.The importance of spark plug ignition performance:

    The ignition performance of the spark plug directly affects the performance of the engine. If the ignition performance of the spark plug is not good, not only will it be difficult to start, the vehicle will run weakly, the oil and gas combustion is incomplete, the fuel consumption is high, the engine life is seriously affected, and a large amount of exhaust gas is generated. ,polluted environment.

  • When to change your motorcycle's engine oil

    Adding oil and changing oil are two different concepts. Adding oil occurs when the oil consumption reaches a certain level. The replacement of oil only occurs when the engine is regularly maintained.

    After the motorcycle has been running for a certain mileage or time, the performance of the oil has been reduced due to various reasons, and it is no longer possible to reliably ensure the good operation and normal life of the engine, and it is necessary to take measures to completely replace the engine oil.

    According to the dipstick, judge when you need to add and how much. The oil level should be between the horizontal and lower horizontal lines of the oil gauge. If the oil level exceeds the upper horizontal line, not only will the oil consumption be too fast, but too much carbon deposit will damage the catalytic device of the discharger. At this time, it is necessary to reduce the oil. When the oil level is lower than the lower horizontal line, the engine may be poorly lubricated, and oil needs to be added at this time.

    Let the motorcycle run for 5 minutes. Wait for 15 minutes after the flameout. The oil dipstick is inserted into the oil filler port and is not twisted. Then pull out and observe the oil trace at the position of the upper and lower horizontal lines.

  • Misunderstanding about the use of motor oil

    1. Less oil is "burning oil"

    Moderate consumption of oil is normal and inevitable. As long as the engine is running, the organic oil is consumed. Normal oil consumption is necessary to maintain the engine operation and will not cause damage to the engine. Note that the engine oil level is frequently checked. If the oil level is found to be below the specified minimum level, the oil should be added in time.

    2. Check the oil condition should be done during maintenance.

    The habit of checking the condition of the vehicle in time should be developed. For the use of harsh conditions, long idle time, frequent stop / start, low speed operation, it is more likely to cause an increase in engine oil consumption, so more attention should be paid to timely inspection and addition of oil.

    3. The oil consumption indicates that there is a problem with the engine.

    There are many factors in the consumption of oil. The viscosity of the oil, the quality of the fuel, the early running-in of the vehicle, the correct driving habits, and the length of the engine idling, etc., all cause different degrees of oil consumption. "Inferior oil" doesn't talk about it (that stuff can't be used at all).

    4. The oil gauge does not detect the oil, indicating that there is no oil in the engine.

    When the oil gauge does not detect the oil, it only indicates that the remaining oil cannot meet the needs of the vehicle. It is necessary to add oil in time, but there is still a lot of oil in the engine. For example, there are at least 0.6 liters of engine oil in the YBR125 engine. So you don't have to panic, but you have to add it.