What Causes No Spark When Starting a Motorcycle?

1 Answers
MarcusFitz
07/29/25 3:44pm
Motorcycle starting with no spark is mainly due to incorrect ignition timing, cylinder scoring, or demagnetization of the motor flywheel magnet. Incorrect ignition timing: For a motorcycle engine to start normally, it requires a strong spark and precise ignition timing. Cylinder scoring: Engine compression can easily lead to cylinder scoring during use. If the cylinder block is scored, engine compression will decrease. If the engine compression is lower than the motorcycle's requirement, it will fail to start normally. Demagnetization of the motor flywheel magnet: Most motorcycle engine generator magnetic fields consist of two or more sub-magnetic fields. However, when the magnet becomes demagnetized, the magnetic field strength of each sub-magnetic field varies, causing asymmetry in adjacent magnetic field strengths and resulting in significant current fluctuations.
Was this review help?
10
5
Share
More Forum Discussions

Where is the Vehicle and Vessel Tax Certificate Located?

Vehicle and Vessel Tax Certificate is the compulsory insurance policy, located on the compulsory insurance sticker on the right side of the car's windshield. On the back of the sticker, which is visible from inside the driver's compartment, you can see the start and end dates of the compulsory insurance. You can also inquire by phone. If you know which insurance company issued the policy, you can directly call the customer service number of that insurance company, provide the license plate number, and inquire. Below is relevant information: 1. Vehicle and Vessel Tax refers to a tax that owners or managers of vehicles and vessels within the territory of the People's Republic of China are required to pay according to the Vehicle and Vessel Tax Law of the People's Republic of China. Starting from July 1, 2007, car owners need to pay the Vehicle and Vessel Tax when purchasing compulsory insurance. 2. On August 1, 2018, the Ministry of Finance, the State Taxation Administration, the Ministry of Industry and Information Technology, and the Ministry of Transport issued the "Notice on Energy-Saving and New Energy Vehicles and Vessels Enjoying Preferential Policies on Vehicle and Vessel Tax," requiring that new energy vehicles and vessels meeting the standards be exempt from Vehicle and Vessel Tax, and energy-saving vehicles meeting the standards be subject to half the Vehicle and Vessel Tax. 3. A tax levied on owners or managers of vehicles and vessels (hereinafter referred to as vehicles and vessels), with vehicles and vessels as the characteristic objects. The vehicles and vessels referred to here are those that should be registered with the vehicle and vessel management departments according to law. In China, the applicable tax amount is implemented in accordance with the "Vehicle and Vessel Tax Item and Tax Amount Table." The financial departments and competent tax authorities of the State Council of China may, based on actual conditions, subdivide tax items within the prescribed scope of tax items and tax amount ranges, and clarify the tax amount ranges for sub-items of vehicles and the specific applicable tax amounts for vessels. The specific applicable tax amounts for vehicles are determined by the people's governments of provinces, autonomous regions, and municipalities directly under the Central Government within the prescribed tax amount ranges for sub-items.
6
5
Share

What is the fuel tank capacity of the GLC?

The fuel tank capacity of the Mercedes-Benz GLC is 66 liters, as officially announced. Owners who have purchased the Mercedes-Benz GLC can also check this information on the vehicle's configuration sheet. The Mercedes-Benz GLC requires 95-octane fuel, with a fuel consumption of 10.5L per 100 kilometers. A full tank of fuel allows for a driving range of approximately 629km. During daily driving, it is essential to monitor the remaining fuel level in the tank. This is typically observed through the fuel gauge inside the vehicle. Under normal circumstances, the fuel level will be accurately reflected on the gauge. The fuel gauge usually has 5 to 6 segments. It is advisable to refuel when only 2 segments remain to avoid running out of fuel midway. During actual refueling, the amount of fuel added may exceed the calibrated capacity. This is because the fuel tank capacity specified by the manufacturer is measured from the bottom of the tank to the safe fill level, with additional space left between the safe fill level and the tank opening. This extra space ensures that the fuel can expand when temperatures rise without overflowing. If fuel is added up to the tank opening during refueling, the actual amount of fuel added may exceed the calibrated tank capacity.
11
0
Share

What grade of gasoline should a Polo use?

polo should use 92-octane gasoline, as this fuel grade is recommended in the vehicle's official owner's manual. In addition to checking the suitable gasoline grade in the owner's manual, Polo owners can also find this information on the fuel tank cap, which is typically labeled. Generally, the appropriate gasoline grade can also be determined based on the engine's compression ratio. Vehicles with an engine compression ratio between 8.6-9.9 should use 92-octane gasoline, while those with a compression ratio between 10.0-11.5 should use 95-octane gasoline. For higher compression ratios, 98-octane gasoline is recommended. However, with the application of some new technologies, the compression ratio alone cannot determine the appropriate gasoline grade. Engines with high compression ratios can also be tuned to use lower-octane gasoline. This is because factors other than compression ratio, such as ignition timing, turbocharging technology, and Atkinson cycle technology, also play a role. Generally, the higher the gasoline grade, the higher the octane number and the better the anti-knock performance. 92-octane gasoline contains 92% isooctane and 8% n-heptane, while 95-octane gasoline contains 95% isooctane and 5% n-heptane. If a Polo is occasionally filled with the wrong gasoline grade, simply switching back to the correct grade after use is sufficient. However, long-term use of the wrong gasoline grade can have the following effects: For vehicles designed for lower-octane gasoline, using a higher-octane grade will not cause damage, but the increase in octane number can alter the fuel's ignition point, leading to delayed combustion in the engine. This results in reduced engine power and thermal efficiency, with the practical effect being poorer performance. For vehicles designed for higher-octane gasoline, using a lower-octane grade can cause engine knocking. Because the octane number is significantly lower, the gasoline's ignition point decreases, causing it to ignite prematurely during the compression stroke. If combustion occurs before the spark plug fires during the compression stroke, resistance will develop during the upward stroke. This resistance makes the engine run very unevenly. If the knocking is imperceptible, it may only increase noise without obvious damage to the engine. However, noticeable knocking indicates severe engine conditions, affecting not only driving stability but also causing abnormal wear on pistons and cylinders, and in severe cases, cylinder scoring.
6
1
Share

What is the range of the ID.4?

The range of the Volkswagen ID.4X is 555KM-607KM. In 2022, there are a total of 5 models of the ID.4X available for sale. Among them, the ID.4X 2022 Pure Edition has a pure electric range of 425KM; the Pure Long Range Edition has a range of 607KM; the Smart Long Range Edition is 607KM; the Premium Long Range Edition is 607KM; and the Performance 4WD Edition has a range of 555KM. If you want to know the current range of the Volkswagen ID.4X during daily driving, you can check it on the central control screen. Click the Volkswagen logo at the top of the screen, and then at the bottom of the pop-up window, you can see the vehicle's mileage. The range is directly related to the three-electric system (battery, electric drive, and electric control) of the electric vehicle. Battery System: The capacity of the power battery directly determines the range. Additionally, excessively high or low temperatures of the battery system can also affect the range. With the same battery capacity, more stable battery temperatures can better ensure the range. Electric Drive System: This mainly includes the drive motor, controller, inverter, and reducer. Its efficiency is determined by the ratio of input power to output power. When the battery capacity is fixed, under the same voltage, the output energy is determined by the efficiency of the drive system. Automakers will fully explore motor efficiency and electric control efficiency to optimize energy consumption and improve range. Vehicle Control System: This mainly refers to coordinating the relationship between the battery, drive system, and chassis brake energy recovery. Under conditions of frequent acceleration and deceleration, the proportion of energy recovery (brake energy recovery) can be dynamically adjusted based on the battery's state and braking requirements, thereby improving energy utilization efficiency. In addition, the braking energy recovery strategy of electric vehicles will directly increase the vehicle's range.
4
5
Share

What is the Chinese name for Jeep?

The American automobile brand Jeep is owned by the automaker Daimler-Chrysler. The world's first Jeep was produced in 1941 during World War II to meet the military needs of the U.S. Army. As the originator of Jeep, DaimlerChrysler exclusively owns this registered trademark. In China, the Jeep brand is limited to Beijing Jeep Corporation Ltd. This means that all other off-road vehicles, such as those produced by Mitsubishi, Toyota, or other companies, cannot be called Jeep. Since July 23, 1941, the Jeep brand has symbolized true four-wheel-drive performance, innovative technology, and continuous improvement. Jeep pioneered the four-wheel-drive segment through Willys-Overland and, in 1983, opened the flourishing path for compact sport utility vehicles (SUVs) with its four-door, four-wheel-drive Jeep Cherokee. Moreover, Jeep vehicles still share a bloodline with the first Jeep. Jeep has been registered as an international trademark since 1950 and has become an international synonym for off-road performance. The Jeep brand has established a reputation for ruggedness, versatility, and genuine four-wheel-drive power. It is widely used not only in military applications but also in various fields such as farming, transportation in harsh road conditions, and disaster relief. Main Jeep models include: Grand Cherokee, Wrangler, Compass, Cherokee, Renegade, Commander, and others. Key milestones in Jeep's development are as follows: In 1938, the U.S. military informed all domestic automobile manufacturers that it sought a lightweight reconnaissance military vehicle to replace traditional three-wheeled motorcycles. In 1940, the U.S. government increased pressure on all domestic automobile manufacturers. It invited bids from 135 manufacturers nationwide, with only Bantam winning the contract. In 1941, in response to the U.S. military's request, Jeep produced the first batch of durable and reliable Willys MB vehicles in just 75 days, capable of single-soldier combat and portable transportation, making significant contributions during World War II. In 1986, Jeep was acquired by Chrysler Corporation. In 2013, the all-new Grand Cherokee was launched. While retaining Jeep's traditional rugged elements, it also significantly increased its smoothness to make it more urban-friendly.
10
4
Share

What should I do if the engine warning light is on in my Kia K2?

If the engine warning light is on, you can follow these steps: First, check whether the engine is running normally, whether there is shaking, black smoke, or difficulty starting, etc. If there is, try not to start it again. It is especially important to note that if the red light is on, do not start the engine again. If the engine is running normally and the car can be driven, please go to a service station as soon as possible to find out the cause. The service station only needs to connect a portable diagnostic tool to easily read the fault code, obtain fault information, and carry out targeted repairs. If the engine is running normally, the owner can also try gently plugging in each wiring harness connector, as it may be caused by a loose connection somewhere, or repeatedly turning the key to the ON position to see if it can be eliminated. Generally speaking, the reasons for the engine warning light being on mainly include the following seven: Sensor failure: The sensors mentioned here include water temperature, crankshaft position, air flow, intake temperature, oxygen sensor, etc. When these sensors are damaged, have poor contact, or the signal is interrupted, the car's ECU cannot accurately obtain engine data, which will cause the engine warning light to come on. Oil quality issues: If fuel and engine oil are not added according to the manufacturer's requirements, it may cause engine wear and lead to the warning light coming on. Poor combustion of the mixture: Poor combustion of the mixture will cause engine carbon deposits or knocking. After being detected by the oxygen sensor and reported to the ECU, the warning light will come on as a warning. Spark plug failure, ignition coil failure, fuel pump failure, and fuel line blockage can all cause poor combustion of the engine mixture. Turbocharging issues: Intake turbocharging pipelines and turbochargers can also cause the engine warning light to come on. The most common of these is turbocharger damage, and the vehicle will also show symptoms such as oil leakage, high oil consumption, reduced power, metal noise, and blue or black smoke from the exhaust pipe. Intake issues: If there is a problem with the car's intake, it may cause the engine pipeline to become blocked, and in severe cases, the engine warning light will come on. If the air filter is not clean and not cleaned regularly, it will cause intake problems. Exhaust issues: Exhaust faults can also cause the engine warning light to come on. Rear oxygen sensor, three-way catalytic converter, exhaust camshaft and bearing failure are all causes of exhaust problems, with the three-way catalytic converter being the most common. The use of leaded gasoline, the use of lead or silicon lubricant additives, damage to the three-way catalytic converter, and engine fuel supply system failures can easily cause three-way catalytic converter failure. Anti-theft system failure: If the car's electronic anti-theft system fails, or if the anti-theft controller does not match the engine electronic controller, the anti-theft system will also cause the engine to not work properly, and the engine warning light will come on.
3
4
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.