What Causes an EFI Scooter to Keep Stalling?

1 Answers
LeMaximus
07/30/25 5:37am
An EFI scooter keeps stalling due to the following reasons: 1. Clogged or contaminated fuel lines; 2. Damaged kill switch or ignition components that short circuit when heated after prolonged operation, causing poor spark plug performance; 3. Overly lean air-fuel mixture in the carburetor. Solutions include: 1. Cleaning the fuel system; 2. Adjusting the carburetor for a richer air-fuel mixture; 3. Replacing the kill switch or ignition components. EFI scooters typically feature continuously variable transmission (CVT) with automatic clutches, lacking gear designs. Simply twisting the throttle starts movement, while releasing it gradually slows down until stopping. Additionally, scooter wheels are smaller than other vehicles, with most drivetrains using belt transmission.
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