What is the wading depth for an EFI scooter motorcycle?
2 Answers
When riding a motorcycle through water, it is crucial to ensure that the water level remains below the exhaust pipe outlet. Otherwise, water can enter the engine through the exhaust valve via the exhaust pipe. If the water level is already very close to the exhaust pipe outlet, avoid riding the motorcycle through the water. Water could easily enter the exhaust pipe, and even if the exhaust pressure prevents it from directly entering the engine, the restricted exhaust flow can cause the engine to stall, rendering it inoperable. This applies to both EFI (Electronic Fuel Injection) and carburetor-equipped motorcycles.
I have been riding an EFI scooter for over ten years. The maximum recommended wading depth should not exceed the center height of the rear wheel, approximately 15 to 20 cm. Exceeding this depth can easily cause engine water ingress, cylinder seizure, or EFI system short-circuit issues. This is because the air intake and exhaust pipe positions of scooters are relatively low, and the electronic fuel injection control unit is sensitive to moisture. Once, I passed through a puddle about 10 cm deep on a rainy day without any issues, but my friend's scooter got submerged up to 20 cm, resulting in ECU failure. Therefore, when encountering deep water, it's best to detour or slow down to a steady speed of 5 km/h for safety. After wading, check the spark plugs and air filter, and dry the components to prevent rust. For daily riding, pay attention to waterproof modifications to ensure smooth and worry-free travel.
