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What Engine Displacement Qualifies a Motorcycle as a Motor Vehicle?

2 Answers
LaVictoria
07/28/25 5:03pm
Motorcycles with an engine displacement of 50cc or more are considered motor vehicles and require registration to be driven on the road. Differences between motorcycles and mopeds: The definition of a motorcycle is an engine displacement greater than 50cc, an unladen weight exceeding 50 kilograms, and a maximum speed exceeding 50 km/h. The definition of a moped (or motorized bicycle) is an engine displacement of 50cc or less, an unladen weight of 50 kilograms or less, and a maximum speed of 50 km/h or less. Precautions for riding a motorcycle: Check the vehicle condition and riding gear before riding; inspect the motorcycle's condition, including the headlights, turn signals, horn, and handlebars to ensure they are functioning properly. Helmets are legally required protective gear, and it is advisable to wear brightly colored clothing. Gloves not only reduce the impact of sweaty hands on riding but also ensure you do not ride in sandals. Driving under the influence of alcohol and driving without a license are strictly prohibited.
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VanRuth
08/11/25 11:34pm
I found that many people are actually unclear about the displacement boundaries of motorcycles. Simply put, any motorcycle with a displacement exceeding 50cc is classified as a motor vehicle in China. Why 50cc? This standard is based on engine power—anything above this displacement is considered powerful enough to be dangerous. However, it's important to note that some mopeds with small displacements but designed speeds exceeding 50 km/h are also classified as motor vehicles. I've seen many young guys riding small-displacement motorcycles without a license, only to have their bikes impounded and fined when caught by traffic police. It's best to check the latest local regulations on the traffic management website, as enforcement may vary by region.
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Where is the air conditioning relay of Wuling Sunshine located?

The air conditioning relay of Wuling Sunshine is located in the vehicle's wiring control box, which is positioned under the steering wheel. You can see it by opening the decorative cover. The air conditioning relay is a multifunctional monitoring and protection device for three-phase three-wire power systems or three-phase electrical equipment. It provides alarm output and protective circuit action output through relay output, offering contact control signals for alarm and protection purposes. Taking the 2020 Wuling Sunshine as an example, it belongs to the micro van category with body dimensions of 3797mm in length, 1510mm in width, and 1820mm in height, a wheelbase of 2500mm, a fuel tank capacity of 38 liters, and a curb weight of 997kg. The 2020 Wuling Sunshine is equipped with a 1.2L naturally aspirated engine, delivering a maximum horsepower of 76PS, a maximum power of 56kW, a maximum torque of 108Nm, and is paired with a 5-speed manual transmission.
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Where to Place a Phone Holder Without Penalty?

Placing a phone holder on the dashboard or center console will not result in penalties and is also safer, as it does not obstruct the driver's view. Below is more information about phone holders: Suction Cup Car Mount: This type of holder uses suction to attach to various surfaces inside the car, such as the windshield or dashboard, allowing for a more direct view of the phone. However, on rough roads, suction cup mounts may detach, and their larger size can obstruct the driver's view, especially when attached to the windshield. Clip-on Car Mount: Clip-on holders attach to the air vents. Compared to suction cup mounts, they are more compact and do not block the driver's view. They are also more affordable. However, their lower placement (on air vents) makes them less convenient to view and can divert attention, posing potential safety risks. Magnetic Car Mount: As the name suggests, magnetic holders use magnets for secure attachment, making them less likely to fall off—provided they are of good quality. Their small size allows them to be placed almost anywhere in the car, making them a popular choice. However, they require 3M adhesive for installation, which can leave difficult-to-remove marks. Additionally, a metal plate must be attached to the back of the phone, which may affect its appearance.
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What does Engine MAX mean?

"MAX" means "maximum." When the MAX button is illuminated on a car's air conditioning system, it represents the strongest cooling mode. For example, after turning on the A/C (air conditioning) switch and then pressing MAX, the air conditioning will activate the strongest cooling mode with the blower operating at maximum airflow. Its purpose is to lower the temperature inside the car as quickly as possible. Here are some related details: Label: The term "max" can be seen not only on air conditioning control buttons but also on various fluid reservoirs in the engine compartment. Here, "max" also carries the meaning of "maximum" or "highest," and some may simply use "M" to denote it. Upper Limit: The "max" marking on fluid reservoirs indicates the upper limit of the fluid level. The highest position of the fluid level should not exceed the horizontal line corresponding to "max." Naturally, where there is an upper limit, there is also a lower limit. "Low" (or sometimes "min" in some cars) represents the lower limit, indicating the minimum fluid level position. This means the fluid level should not fall below the horizontal line corresponding to "low." These markings are most noticeable on the overflow tank (i.e., the radiator). The optimal fluid level is between the upper and lower limits.
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What's the situation when the car's brakes are too hard to stop the vehicle?

Reasons for hard-to-press brakes: Braking before engine shutdown: The vehicle's braking system operates at maximum efficiency when the engine is running, with the brake booster being the key component that amplifies the force applied to the pedal. When the engine is off, the brake booster ceases to function, typically depleting its residual vacuum force after about three pedal presses. Thus, the sensation of hard brakes is essentially due to the lack of assistance from the brake booster. Solution: In this scenario, simply restart the engine and firmly press the brake pedal again. Once the engine is running, the brake booster will resume operation, and the brake pedal will return to normal. Brake booster malfunction: If the car's brake booster is leaking or malfunctioning, and you haven't pressed the brake pedal after turning off the engine, or you notice the brake pedal is unusually hard to press while driving, it's likely due to a faulty brake booster, possibly from a leaking or clogged vacuum tube. Solution: If this issue is detected before driving, it's safest to avoid driving and have the vehicle inspected at a repair shop immediately. If the problem arises while driving, remain calm, prioritize slowing down to a stop, and attempt multiple pedal presses to see if braking can be restored. Applying strong pressure often helps engage the braking force.
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Should You Downshift When Overtaking with a Manual Transmission?

Whether to downshift when overtaking with a manual transmission depends on the car's power and speed during the overtaking maneuver. If the speed is already high, there's no need to downshift—simply press the accelerator. However, if the RPM is low and the speed is slow, downshifting is necessary for the quickest and safest acceleration to overtake. When overtaking, it's important to observe the dynamics of the vehicle being overtaken by turning your head, choose the right moment to overtake, accelerate and merge into the adjacent lane, pass the vehicle in a straight line until a safe distance is achieved, and then merge back into the original lane. Understand your car's acceleration performance before overtaking: The driver should fully understand the car's acceleration capabilities before attempting to overtake. Ensure that the horn, turn signals, and headlights are functioning properly. Choose a straight, wide road with good visibility, no obstacles on either side, and no oncoming traffic within 150 meters ahead. Overtaking should only be done under safe conditions, avoiding reckless maneuvers regardless of subjective or objective conditions. Increase speed before overtaking: Before overtaking, increase your speed and approach the left side of the vehicle you're overtaking to reduce the distance between you. Turn on the left turn signal and honk the horn (or flash the headlights at night) to notify the vehicle ahead. Once you confirm that the vehicle ahead is yielding or signaling to yield, slightly steer to the left while maintaining a safe lateral distance from the vehicle being overtaken.
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What does the M gear in a manual-automatic transmission mean?

M gear is the manual mode of a manual-automatic transmission. In this gear, shifting can be done like in manual transmission vehicles, with upshifting at high speeds and downshifting at low speeds. When using the manual shifting mode, you need to switch the gear lever to the M position. While driving, you can directly shift into the M gear. Shifting can be done by simply moving the gear lever, using the paddle shifters on the steering wheel, or pressing the shift buttons. When climbing a long steep slope, the driver can switch to manual mode and engage the 1st gear. This keeps the vehicle in a low gear, preventing frequent gear changes, which makes climbing more powerful and also protects the transmission. When descending a long slope, the driver should also use manual mode to keep the transmission in a low gear, which helps control the speed without prolonged braking, avoiding overheating and reduced braking performance. Advantages of manual-automatic vehicles: Faster braking and stopping: When the vehicle is traveling at high speed and requires urgent braking, using manual downshifting can slow the vehicle down as quickly as possible. This is easier to master and operate in manual mode, allowing the vehicle to stop faster. Faster cornering: Normally, when taking a corner, the driver first applies the brakes to slow down before entering the corner, then accelerates when exiting. By switching to manual-automatic mode before entering the corner and downshifting to use engine braking to control speed, the driver can smoothly and safely exit the corner with just a light press of the accelerator. Faster overtaking: When overtaking, switching from D gear to manual mode and performing two consecutive downshifts increases the engine speed and torque. With a light press of the accelerator, the vehicle can overtake easily and quickly.
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