Vacuum Fuel Pump For Honda NH90 Yupy Lead 90 Bali SJ50 SJ100 Shadow SRX50 SRX90

Vacuum Fuel Pump for Honda

This vacuum fuel pump uses crankcase pressure to deliver fuel from the gas tank to the carburetor on small engines and scooters.

Overview

This vacuum fuel pump is designed to keep your scooter fuel delivery system operating smoothly and reliably. Powered by engine vacuum, it transfers fuel consistently without requiring electrical connections. Scooter riders can replace a faulty vacuum fuel pump to resolve issues with fuel starvation and hard starting.

Built For Performance

• Premium diaphragm material resists degradation from ethanol fuel blends
• Precision internal valves prevent fuel backflow and maintain line pressure
• Compact aluminum housing resists mechanical impact and corrosion
• Three-port design connects easily to fuel in, fuel out, and vacuum lines

Fits These Machines

• for Honda NH90 Yupy Lead 90
• for Honda Bali SJ50
• for Honda SJ100
• for Honda Shadow
• for Honda SRX50
• for Honda SRX90

On-The-Job Use

• Restoring correct fuel flow to scooter carburetors after long storage periods
• Replacing dry-rotted or leaking internal diaphragm vacuum pumps
• Troubleshooting fuel starvation issues on two-stroke scooter engines

Specs At A Glance

Good To Know

Q: How does a vacuum fuel pump operate? A: It uses the pulsing pressure changes inside the engine crankcase to move an internal diaphragm back and forth, pumping fuel mechanically.

Q: What causes these fuel pumps to fail? A: The internal rubber diaphragm can dry out, crack, or become stiff due to old fuel or ethanol damage, which stops the pump from pulsing.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.