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What are the symptoms of a faulty motorcycle spark plug?

2 Answers

LeIvan

07/29/25 4:37pm

Motorcycle spark plug failure symptoms requiring replacement: difficulty starting, low power, excessive exhaust emissions, increased fuel consumption; severe spark plug damage with phenomena such as blistering at the top, black streaks, cracking, or electrode melting. Methods to determine if a spark plug is damaged: Remove the spark plug for observation and assess its condition based on the following appearance colors. A normal spark plug's insulator skirt and electrodes appear gray-white, gray-yellow, or light brown. A properly functioning spark plug has a reddish-brown insulator skirt, with an electrode gap between 0.8-0.9mm and no signs of electrode burn. If the spark plug is contaminated with oil or deposits but is not damaged, it can continue to be used after cleaning off the oil and deposits. If the spark plug is severely damaged, showing blistering at the top, black streaks, cracking, electrode melting, etc., the cause of the damage should be identified. After troubleshooting, replace the spark plug with a new one. Additionally, if the spark plug appears black as if smoked, it indicates the wrong heat range was selected or the air-fuel mixture is too rich, with oil seepage.

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Millard

08/14/25 5:57am

I previously encountered a spark plug issue while riding my motorcycle, and the symptoms were very obvious. The bike was extremely difficult to start, especially in cold weather—pressing the electric start button for a long time yielded no response, and sometimes I had to kick-start it several times. While riding, the engine shook violently, and the idle speed was unstable, causing intense body vibrations like an earthquake. Acceleration was uneven—stepping on the throttle resulted in weak power output, making it sluggish and struggling even on slopes. Fuel consumption also increased significantly; normally, a full tank could last 200 km, but that time, the low-fuel warning light came on at just 150 km, wasting extra money on gas. Incomplete combustion occasionally caused black smoke from the exhaust. Ignoring this issue could even affect the engine, leading to further efficiency losses. I recommend checking the spark plugs immediately if you notice difficulty starting, excessive shaking, or a sudden spike in fuel consumption—replacing them is quick, simple, and low-cost.

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At an intersection, should straight-going vehicles yield to left-turning or right-turning vehicles?

Yielding to either left-turning or right-turning vehicles when going straight is not in compliance with regulations. The correct yielding rule is that turning vehicles must yield to straight-going vehicles. When straight-going vehicles encounter turning vehicles, it is the turning vehicles that must yield to the straight-going ones, not the other way around. If a traffic accident occurs due to a turning vehicle failing to yield to a straight-going vehicle, the turning vehicle will bear full responsibility. Below are the relevant regulations: When motor vehicles pass through intersections without traffic signals or traffic police directing traffic, in addition to complying with the provisions of Article 51, Paragraphs (2) and (3), they must also adhere to the following rules: 1. If there are traffic signs or markings, yield to the party with the right of way. 2. If there are no traffic signs or markings, stop before entering the intersection, look around, and yield to vehicles coming from the right; vehicles on minor roads must yield to those on major roads. 3. Turning motor vehicles must yield to straight-going vehicles. 4. Right-turning motor vehicles traveling in the opposite direction must yield to left-turning vehicles.

How to Schedule Subject 4 Exam?

Subject 4 exam scheduling can be done on the official website of the local traffic police department's vehicle management office. Below is relevant information: 1. Notes for Subject 4 exam scheduling: No ticket number is required for Subject 4, you can directly schedule the exam. There is no limit to the number of attempts for Subject 4, as long as it is completed within the validity period of the skill certificate. If you fail the exam, you must wait 10 days before rescheduling. Students whose certificates are about to expire should pay attention to the timing. After passing the Subject 4 exam, the driver's license will be issued on the same day. 2. Notes for canceling a scheduled exam: After submitting the scheduling request, you can cancel the exam appointment online, but it must be done before the appointment is confirmed. After cancellation, the user's priority ranking remains unchanged. For students who have successfully scheduled an exam but cannot attend due to unforeseen circumstances, the exam appointment cannot be canceled online. Please cancel at least one day in advance at the designated window of the vehicle management office. After successful cancellation, the exam slot will no longer be reserved, and you will need to reschedule the exam to take it.

Why Does the Passenger Side Window Fog Up?

Window fogging occurs simply due to the large temperature difference between the inside and outside of the car. Here are some methods to defog: 1. Use the air conditioning effectively: While driving, you can first turn on the cooling air; if you want a thorough solution, it's best to turn on the heating air before driving or when parked on the roadside until the fog completely disappears. 2. Open windows for air circulation: Based on the principle of fogging, you don't even need to use the air conditioning. Just slightly open both side windows to allow air inside the car to circulate. The advantage of this method is that as the air inside and outside the car circulates, the temperature inside and outside the car will roughly equalize, preventing fogging. 3. Purchase specialized anti-fog products: Anti-fog sprays can be applied to the inside of the windshield and wiped evenly. There are also special anti-fog towels available on the market, which come in dry and wet versions. These towels are more convenient than sprays—just wipe and they work—but their effectiveness is shorter, usually lasting no more than 24 hours.

How Long Does a Minor Maintenance Take?

A minor maintenance typically takes between twenty minutes to an hour. Here are some relevant details: 1. A minor maintenance is recommended every six months or every 5,000 kilometers driven. 2. The scope of a minor maintenance is relatively limited, primarily involving inspections of wear-prone components such as engine oil and the three filters (air, oil, and fuel). Generally, the first maintenance for a car is recommended at 5,000 kilometers or one year of use, while the second maintenance is recommended at 10,000 kilometers or two years of use. The main focus of these services is inspecting the car's three major components: the engine, chassis, and transmission. 3. It is essential to keep detailed records of all maintenance work for future reference if issues arise. Typically, major maintenance should be performed at a 4S dealership, as they offer higher quality assurance despite potentially higher costs. For minor maintenance, you can opt for external auto repair shops, ensuring that original manufacturer fluids are used—this won't harm the vehicle and can significantly reduce costs. However, always choose reputable repair shops and high-quality parts to avoid post-maintenance quality issues.

Is Lynk & Co a Geely brand?

Lynk & Co belongs to the Geely Holding Group. Below is some information about the Lynk & Co 06: 1. In terms of body dimensions, the Lynk & Co 06 measures 4340mm*1820mm*1625mm in length, width, and height, with a wheelbase of 2640mm. 2. In terms of power, the Lynk & Co 06 fuel version is equipped with a 1.5T engine, delivering a maximum power of 177 horsepower and a peak torque of 265 N·m, paired with a 7-speed dual-clutch transmission. The Lynk & Co 06 PHEV version features a powertrain composed of a 1.5T engine and an electric motor, with the engine delivering a maximum power of 177 horsepower and a peak torque of 265 N·m, while the electric motor provides a maximum power of 60 kW and a peak torque of 160 N·m. It is equipped with a ternary lithium battery pack, achieving a top speed of 200 km/h, a fuel consumption of 1.5L per 100 km, and a pure electric range of 55 km.

How to Deal with Low Coolant Level in the Vehicle Radiator?

Solutions for low coolant level in the vehicle radiator are as follows: 1. If it's a pipe leak, go to a repair shop to patch it up or replace the pipe. 2. If the oil cooler sealing ring is damaged or has pinholes, the sealing ring needs to be replaced. 3. If the radiator cap is not sealing tightly, try resealing it. If it still doesn't seal properly, go to a repair shop to replace it. The reasons for low coolant level in the vehicle radiator are as follows: 1. Leakage from pipe joints or the pipe itself—replace the pipe or reinforce the seal. 2. Cracks in the cylinder block, or a loose or damaged cylinder head gasket, causing coolant leakage. 3. Damaged or pinhole-prone oil cooler sealing ring, leading to coolant leakage. 4. The radiator cap is not sealing tightly. 5. Leakage from the heater radiator. 6. Leakage from the three-way connector.

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