What Causes the Fuel Pump of an EFI Motorcycle to Make No Sound?
2 Answers
When the fuel pump of an EFI motorcycle makes no sound and fails to supply fuel, it is typically due to a damaged fuel pump. Replacing the fuel pump will resolve the issue. Types: The fuel pump is a lightweight and compact pump, categorized into three main types: in-line, distributor, and unit pumps. The fuel pump requires a power source to operate, and its lower camshaft is driven by the engine crankshaft gear. Composition: The fuel pump features a housing made of aluminum-containing material and a movable molded component housed within it. This movable component is at least partially made of a sinterable, iron-based alloy material containing austenite.
The other day I was checking my fuel-injected motorcycle, and the silent fuel pump really gave me a headache for a while. Normally, when you turn on the ignition, the fuel pump should briefly hum for a few seconds to supply fuel to the engine. If there's no sound, it might be a fuel pump failure—either it's aged or burnt out. But don't rush to replace it just yet; first, check if the fuse is blown. That thing is easy to inspect in the fuse box. If the fuse is intact, it could be a poor electrical connection, like a loose or corroded plug, cutting off the current. Or the relay might be faulty—a small component controlling the fuel pump's power. I once had an issue where, after pushing the bike to the repair shop, they found it was just worn wiring, fixed for a small cost. Never force-start the bike if the fuel pump is silent; insufficient fuel supply could cause more engine damage. For safety, stop and inspect, and if you're unsure, take it to a professional shop ASAP. Riding safely comes first.
