Scooter Starts But Loses Power
If you’re riding down the street in your scooter and suddenly it loses power, it’s typically due to a problem with fuel delivery or with electrical spark. Sometimes it can be as simple as a quick short circuit caused by water splashing onto the motor, or the signs of a more complex situation. Regardless of the cause, there is a system of checks that we recommend you completing before taking your scooter into a mechanic to be repaired; or trying to fix the situation on your own.
- Visually inspect all wiring: The primary cause of misfiring engines is due to electrical issues. In fact, 90 percent of all issues like this one are caused by a loose wire or one that has a short. Here is a list of specific items that you should visually check.
- Check the battery for charge.
- Check the wires from the battery to the starter and ignition coil
- Check any fuses next to the relay box. You’ll notice this as there are multiple wires running from one spot near the engine.
- Check the spark plug wires and the spark plug for signs of fouling. One way to check this is if the spark plug appears to be very wet or if a lot of excess fuel flows out of the spark plug hole after you remove it. This is a sign of a bad spark plug wire, a bad CDI or relay (which is highly unlikely) or a bad spark plug itself. The recommended replacement spark plug for any of our scooters is an NGK CR6HSA or CR7HSA.
- Check the Fuel System: The other main reason why your engine would shut off while the engine is running is due to fuel. There are basically three issues that can cause this problem; bad fuel, clogged fuel filters, or carburetor / fuel injector issues. The best way to solve this issue is to empty the fuel tank, inspect all fuel lines and filters, and clean the fuel system (carburetor or fuel injector). If you have experience with this type of mechanical work, you’ll know how to do the job. However, if you don’t, please either call our service department or contact a local scooter mechanic to complete this task. The fuel systems on most scooters we sell are complex and should be worked on by certified or experienced mechanics only.