chinese atv valve adjustment spec



As a website operator in the automotive industry, I understand the importance that accurate information has on the safety and efficiency of vehicles. In this article, we will be discussing the topic of Chinese ATV valve adjustment specs, as it is one of the most critical maintenance items to ensure the proper function of an ATV engine.

What are ATV Valve Adjustments?

ATV valve adjustments refer to the process of adjusting the clearance between the camshaft, rocker arm, and valve. The valve adjustment process is critical for ensuring the proper function of the engine, as it directly relates to the timing and duration of fuel combustion. Improper valve clearance can lead to a reduction in engine power, increased fuel consumption, or even severe engine damage.

Why are Valve Adjustments Necessary?

Valve adjustments are necessary for several reasons. Firstly, the clearance between the camshaft, rocker arm, and valve tends to become tighter as the engine gets older. Additionally, engine components such as camshafts and lifters tend to wear out and need replacement, which requires valve adjustments as part of the repair process. Lastly, ambient temperature changes can cause metal expansion and contraction, which can affect the valve clearance and ultimately lead to the need for a valve adjustment.

Chinese ATV Valve Adjustment Specs

Chinese ATV valve adjustment specs may vary depending on the manufacturer and model of the ATV. However, most Chinese ATVs have a 110cc engine, which requires the following valve adjustment specs:

Intake Valve: 0.07-0.10mm
Exhaust Valve: 0.10-0.13mm

It is important to note that these specs are for general reference, and the specific specs for your ATV may differ. Therefore, it is best to consult your ATV owner’s manual to obtain the correct specifications before attempting the valve adjustment process.

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Valve Adjustment Process

The valve adjustment process can be daunting for beginners, but it is a relatively simple process that can be done with the right tools and knowledge. Here are the general steps to perform a valve adjustment on your Chinese ATV:

1. Remove the valve cover: The valve cover sits on the top side of the engine and protects the valves from external contaminants. Removing the valve cover is typically the first step in the valve adjustment process.

2. Locate the TDC (top dead center) mark: TDC is the highest point of the piston’s movement inside the cylinder. To adjust the valves, you need to find the TDC mark on the flywheel or rotor of the engine.

3. Adjust the valve clearance: Once you locate the TDC mark, you can begin the valve adjustment process. With the valve cover removed, locate the adjusting screw on the rocker arm and use a feeler gauge to set the clearance to the manufacturer’s specifications.

4. Repeat the process: After adjusting one valve, repeat the process for the remaining valves.

5. Reinstall the valve cover: Once you have completed the valve adjustment process, reinstall the valve cover and start the engine to check for any signs of proper function.


Valve adjustments are one of the most critical maintenance items for an ATV engine, and ignoring this process may lead to significant engine damage. As a website operator in the automotive industry, it is our responsibility to educate consumers on the proper maintenance and repair processes for their vehicles. By understanding the Chinese ATV valve adjustment specs and following the correct valve adjustment process, you can ensure your ATV engine achieves optimal performance and longevity.

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