What are the reasons why a motorcycle scooter won't start?

[OJustin]

The reasons why a motorcycle scooter won't start are: 1. No high voltage electricity in the spark plug; 2. Abnormal cylinder pressure; 3. Air leakage in the valve and intake pipe; 4. No fuel in the carburetor; 5. Carburetor blockage. It is recommended that the owner clean the carburetor, test whether the electronic choke is working properly, and check the fuel suction switch, which is located under the fuel tank. Disconnect the suction switch connecting pipe on the carburetor and also remove the carburetor fuel inlet pipe. Use your mouth to suck on the suction pipe of the fuel suction switch to see if gasoline flows out from the carburetor fuel inlet pipe. During the motorcycle break-in period, it is not advisable to use fully synthetic lubricating oil; instead, high-quality mineral lubricating oil should be chosen. After the break-in period, if mineral lubricating oil is added, it needs to be replaced every 2,000 km; if fully synthetic lubricating oil is used, it should be replaced approximately every 4,000 km. If the engine has an oil filter, the oil filter also needs to be replaced. Every time the lubricating oil is changed, the oil filter should be replaced as well.