What are the reasons why a scooter cannot exceed 40 km/h?

1 Answers
McMason
07/29/25 9:42pm
There are many reasons why a scooter cannot exceed 40 km/h. You can check whether the air filter, carburetor, and exhaust pipe are clogged, clean or replace the air filter element, clean the carburetor, and check whether there are problems with the carburetor's mixture ratio, fuel level, vacuum diaphragm, needle valve, electric choke, etc. Also, check if the vacuum fuel tank switch is faulty, if the spark plug is damaged or if there is a high-voltage misfire, and if the drive belt and pulley are slipping. Below are some solutions to common problems: 1. Worn piston rings: Solution: Replace the piston rings. 2. Damaged cylinder gasket causing air leakage: Solution: Replace the cylinder gasket. 3. Incorrect ignition timing: Solution: Ignite at the correct time. 4. Loose belt: Solution: Tighten the belt.
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