What to Do When the Motorcycle Fuel Line Doesn't Deliver Fuel?

[MacRicardo]

Go to the after-sales service to clean and inspect the fuel tank cap, and unclog the vent hole. Below is the relevant content introduction: 1. Scooter: For a scooter, the fuel line should not leak fuel when the engine is off, but the fuel line itself may retain some fuel. Once this fuel is drained, no more should come out. If fuel continues to leak or drip, it might be due to a newly replaced fuel tank valve that doesn't close tightly. It's best to try replacing it again. 2. Vacuum Fuel Delivery: Scooters generally use a vacuum fuel delivery system. When the engine is not running, fuel inside the tank won't flow out. The fuel tank valve has two rubber hoses: one with a filter leading to the carburetor is the fuel line, and the other, thinner one leads to a tee (or cross) connector, which then connects to the intake pipe and carburetor, serving as the suction line. If you remove this hose and create suction, the other fuel line will deliver fuel. When the engine starts, due to the negative pressure, it continuously draws suction from this hose, causing fuel inside the tank to flow continuously to the carburetor.